With many British names invading the Yankee name pool, the sophisticated Alistair could and should be part of the next wave. It debuted in the US Top 1000 in 2016. You have a triple choice with this name--the British spell it Alistair or Alastair, while the Scots prefer Alasdair--but they're all suave Gaelic versions of Alexander. Adopted by the lowland Scots by the seventeenth century, the name didn't become popular outside Scotland and Ireland until the twentieth century.
 Both Andrew Lloyd-Weber and Rod Stewart chose the Alastair spelling for their sons' names.

Alistair

Arthur, once the shining head of the Knights of the Round Table, is, after decades of neglect, now being polished up and restored by stylish parents, inspired perhaps by the new generation of royals. Arthur has led the list of possible names for the young British princes, chosen as a middle name for Prince Louis, son of William and Catherine, Prince and Princess of Wales.
 In addition to its leading role in the Arthurian legends, Arthurs figure prominently in Nathaniel Hawthorne's The Scarlet Letter, Edgar Allan Poe's The Narrative of Arthur Gordon Pym of Nantucket and George Eliot's Adam Bede. There are also countless Arthurs in children's literature, movies, and TV -- including The Fonz of Happy Days fame. More recently, Arthur was the son of Mr. and Mrs. Santa in the eponymous movie Arthur Christmas.
 Arthur has many notable namesakes, including playwright Arthur Miller; writer/astronomer Arthur C. Clarke; writers Arthur Conan Doyle, Arthur Rimbaud and Arthur Koestler; philosopher Arthur Schopenhauer; conductor Arthur Fiedler; and tennis great Arthur Ashe, the first African American to win the U.S. Open. Queen Victoria's seventh child was Prince Arthur.
 Arthur was a Top 20 name from at least 1880 through 1926. And in 2011, actress Selma Blair named her son Arthur Saint.

Arthur

Since Aurelius was given the supermodel seal of approval by Elle Macpherson, this is one of the Roman emperor names, like Augustus, now in the realm of possibility. Like the female Aurelia and Aurora, Aurelius has a particularly warm golden aura.
 In ancient Roman history, the name is associated with Marcus Aurelius, a Roman Emperor from 161 to 180 AD, the last of the so-called "Five Good Emperors." He is also considered one of the most important Stoic philosophers. He granted his name en masse to citizens of the empire who didn’t have one, making Aurelius a common and default nomen (family name) towards the later years of the empire.

Aurelius

Avalon, an island paradise of Celtic myth and Arthurian legend--it was where King Arthur was taken to recover from his wounds-- and also the colorful capital of the California island of Catalina-- makes a heavenly first name. Actress Rena Sofer and British musician Julian Cope used it for their daughters.
 Avalon manages to blend the appeal of Ava and Evelyn, while sounding more interesting and unique.

Avalon

Accalon 

Anir 

Argante

Astolat

Unusual Asian option, and also the name of the Dwarf Lord from Lord of the Rings.

Balin

As modern as it sounds, Blaise is an ancient Christian martyr name. In Arthurian legend, Blaise is the name of Merlin the Magician's secretary. Its relation to the word and name Blaze gives it a fiery feel. Amanda Beard named her baby boy Blaise Ray.
 Saint Blaise, an Armenian bishop, is the patron saint of wild animals and those with sore throats. Blaise Pascal was the seventeenth century French mathematician-physicist-inventor-writer-philosopher among whose many accomplishments was the invention of the calculator. And in the modern world, Blaise Zambini is a minor character in the Harry Potter franchise.

Blaise

Blanche, which originated as a nickname for a pale blonde and then became associated with the notion of purity, was in style a century ago, ranking in the double digits until 1920. She then had to fight the stereotype of faded Southern belle, a la Blanche DuBois in Tennessee Williams's A Streetcar Named Desire and Blanche Devereaux in TV's Golden Girls. Now all three of the Golden Girls--Blanche, Rose and Dorothy--could be ready for revival, with Blanche sounding like a stronger, simpler alternative to Bianca.
 A saint's name, Blanche was a royal name in France by the twelfth century, then was brought to England by the French wife of Henry I. One possible powerful namesake is Blanche Scott, one of the original daredevil aviatrixes. You might also take its meaning to relate to snow, making it one of the perfect <a href="https://nameberry.com/list/89/winter-baby-names">winter baby names</a>.

Blanche

A little heavy on the fiber content; we prefer Bram. But Bran is also the Celtic god of the underworld, whose symbol is the raven. It's probably not a coincidence that George R.R. Martin chose this name for the Stark heir who assumes the mystical title of "Three-Eyed Raven" in his A Song Of Ice And Fire books and HBO's Game of Thrones. The character's full name is Brandon.

Bran

Bruin is the Old English term for bear, taken from the Dutch word meaning brown.  Bruin might be a sports fan's choice or an animal name in hiding.  As a kind of hybrid of Roone and Bruno, it's definitely got some cool.

Bruin

Bedivere 

Clarine

Caelia

Cerdic

This old Scottish form of Helen has had quite a history, going from appearing as one of the shining heroines of the Arthurian legends, the princess who fell in love with Sir Lancelot and became the mother of Sir Galahad, referred to as 'Elaine the fair' and 'Elaine the lovable', to being the name of the most famous of New York's celebrity restaurants, to being the archetypal New York neurotic on Seinfeld.
 Elaine is a homophone for French Helene, just one of many names that a was imported to Scotland during the centuries that Scotland and France had a mutual enemy in England.
 Elaine entered the Top 100 in the early 1920s, and remained there for close to forty years, peaking at Number 42. Now, after a long slump, we see signs of a possible rise along with all the other El-names. For parents looking for a more unusual name, try Yvaine.

Elaine

Evaine

Enide

Does Fay really need that e at the end? We vote no, but modern parents disagree: The Faye spelling was used for nearly 300 girls in 2014, vaulting the name back onto the Top 1000 after a 35-year absence, nearly ten times as many babies as received the Fay spelling.
Some people may feel spelling it Faye makes the name more balanced and complete, as Anne of Green Gables famously said about her name. The original Fay, Morgan le Fay, was a sorceress of the Arthurian Legends. Faye may also be used as a short form of Faith.

Faye

Florence is back, returning to the US Top 1000 girl names in 2017 after a nearly 40 year absence. Other English-speaking countries have been quicker to welcome Florence back into fashion. 
 
The name has a lot going for it, both for its floral feel and as a place name connection to the lovely Italian city (after which Florence Nightingale was named—it was her birthplace). The association to the city seems to be helping Florence stir back to life, along with cousin Flora.
 The band Florence + the Machine, headlined by red-haired Florence Welch, has also helped to rejuvenate its image.
 Florence was most popular in the US at the turn of the last century and in the early decades of the twentieth—it was in the Top 10 from 1886 to 1906. 
 Florence has a diverse mixture of namesakes and references—a character in Dickens's Dombey & Sons, a US First Lady (Harding), one of the Supremes, the Brady Bunch's Henderson, track and field star Florence Griffith Joyner, and several TV characters.
 Florence has some particularly lively nicknames—Flo, Flossie, and Florrie.

Florence

Garreth

Gavin, a name with Scottish roots, has stepped into the spotlight, replacing the dated Kevin, thanks in part to pop-rock sensation Gavin DeGraw and Bush lead singer Gavin Rossdale. 
 Gavin also has made literary appearances in J.M. Barrie's The Little Minister and in William Faulkner's Snopes family trilogy. In the form Gawain, he was one of the Knights of King Arthur's Round Table.
 Gavin entered the ranks in the 1950's and climbed as high as Number 30, in 2008, before dropping a bit on the charts.

Gavin

This name of the courteous Knight of the Round Table, the nephew of King Arthur, has long been superseded by its Scottish form, Gavin. 

Gawain

Guinevere was the name of the beautiful but ill-fated queen of Camelot, for so many years eclipsed by its modern Cornish form Jennifer. Today, Guinevere could be a cool possibility for adventurous parents intrigued by this richly evocative and romantic choice.
 Guinevere shares the attractive short form Gwyn with Gwyneth. Other cousin ideas: Gwendolen, Genevieve, Jenna, or Gwen.

Guinevere

Gwendolen, an ancient Welsh favorite, retired decades ago in favor of the short form Gwen, but now, as in the case all across the naming board, the nickname has faded and the more distinguished original is up for reappraisal. Gwendolen means "white circle," probably alluding to an ancient moon goddess, and appears in both Welsh and English legend, once as a fairy with whom King Arthur fell in love and another was the wife of the wizard Merlin.
 Gwendolen is the name of principal characters in George Eliot's novel Daniel Deronda and in the Oscar Wilde play, The Importance of Being Earnest.
 An alternate spelling is Gwendolyn, as in Gwendolyn Brooks, the first African-American woman to win a Pulitzer prize for poetry. Gwendolyn, always the more popular spelling in the U.S. and the full name of the character Winnie Cooper on The Wonder Years is now at Number 514, having reached as high as 112 in the 1950's.
 Singer Gwen Stefani was actually christened Gwen.

Gwendolen

Galahad

Gorlois

Previously used primarily by Latino families, this name of the great hero of the Trojan War as related in Homer's Iliad is beginning to be considered more seriously by others seeking noble ancient hero names as well--it was also the name of the knight who raised King Arthur as his own son.
 In addition to being used for many contemporary Hispanic movie and TV characters,
other Hectors appeared in such films as Mystic Pizza and Lars and the Real Girl. In literature, you can find Hectors in Thackeray's Vanity Fair and Balzac's Cousin Bette.
 Some notable real-life Hectors: composer Berlioz and actor Elizando.

Hector

Like twins Helene and Elaine, a relic of the 1930s to 40s French Renaissance of names. 

Helaine

Iseult

Now that Tristan has been rediscovered, maybe it's time for his fabled lover in the Arthurian romances and Wagnerian opera, a beautiful Irish princess, to be brought back into the light as well. 
 This would make an artistic and romantic choice, as the medieval heroine is seen as a symbol of undying love. 
 In Marilyn French's novel The Women's Room, the character Isolde is nicknamed Iso. Isolde is currently a Top 500 name in the Netherlands. Variations include Iseult, Isolt, Isoud, Isolda and Yseult.

Isolde

Igraine

In Arthurian legend, Lancelot was one of the most dashing of the Knights of the Round Table who eventually had an affair with Queen Guinevere: it makes for a romantic story-- but perhaps overly romantic-- name.

 An older spelling is Launcelot, as seen in Shakespeare's Launcelot Gabbo in The Merchant of Venice and two Tobias Smollett novels.

 Short form Lance has had an independent life of his own.

Lancelot

Lionel is one leonine name that hasn't taken off as cousins Leo and Leonardo have, though it did reenter the Top 1000 in 2010 after several years away; it was at its highest point in the 1920s and 1930s.
 This French diminutive of Leon has had many worthy namesakes over time, including Sir Lionel, a Knight of the Round Table, actor Barrymore, critic Trilling, musicians Hampton and Richie, Argentine Olympic footballer Messi, and characters in numerous movies and TV shows such as gruff but loveable Lionel Hardcastle in the Judi Dench comedy As Time Goes By. Real life Australian speech therapist Lionel Logue was portrayed in The King's Speech.
 Lionel Barrymore, of the famed theatrical family, was a mainstay of Golden Age Hollywood films, and kids might like the association to Lionel trains.
 This is a timeless choice worth considering.

Lionel

Lucan is a rarely heard Irish name, a Luke form with the trendy an ending. 

Lucan

Lunette

Linda begat Lynn which gave way to Lynette, which peaked in the late 1960s. Lynette has been off the Top 1000 for a couple decades now, and the Lynn variations finding the most favor are those that put the "lyn" part at the end: Evelyn, Madelyn, Brooklyn.

Lynette

Laudine

Also spelled Madog, which was the name of an early Welshman, Madog ap Owain Gwynedd, reputed to have been the first European to discover North America in 1155. Maddox, the name of Angelina Jolie and Brad Pitt's oldest child, is a stronger and more familiar choice.


Madoc

This name of the famous fifth-century sorcerer and mentor of King Arthur may or may not be a bit wizardy for a real-life modern child. Its most noted modern bearer: football star turned actor Merlin Olsen, whose father was named Merle.

Merlin fell off the US Top 1000 half a century ago, though it ranks in the Nameberry Top 1000, which could be a harbinger of its return. About 50 baby boys were named Merlin in the US last year, and about ten girls. It is used in contemporary Germany.

Merlin

Morgaine

Since Morgan is used as--or more--frequently for girls as for boys, this feminization has fallen by the wayside. It drew some brief attention via the pop singer Morgana King. 
The similar Morgiana appears in Tales from the Thousand and One Nights.

Morgana

The mythological Morrigan was the ancient goddess of war, often symbolized by a crow.  Besides being a name, this is also used as a proper noun preceded by an article: the Morrigan, defined as a monster in female form.  

The meaning of Morrigan has been related to both terror and greatness.  While some relate the name to Morgan of the Arthurian legends, Morrigan and Morgan are actually unrelated.

Morrigan

Mordred 

Morguase

Nimiane

There are several Percivals scattered through the Harry Potter series, which might help transform the old-fangled, fussy image it has accrued. Actually, the original Percival was the one perfectly pure Knight of the Round Table, a worthy hero. The name was invented in the twelfth century by a poet named Chretien de Troyes, for his ideal knight in the poem Percevale, a Knight of King Arthur. 
 Percival is found in other forms of literature as well, including Wilkie Collins's The Woman in White, and Tennyson's "Idylls of the King" contains a section devoted to Sir Percival. Wagner transformed the name to Parsifal for his opera.
 Percy, which seems like a nickname for Percival but is really a stand-alone Norman place name, is beginning to attract some favorable attention from cutting-edge namers.

Percival

A fabled storybook name via the heroine of Sir Walter Scott's novel Ivanhoe (1819), which featured a heroine called Rowena of Hargottstanstede, and also a Harry Potter name, as Rowena Ravenclaw, founder of one of the Hogwarts houses.. Rowena has some old-fashioned charm, though most modern parents seem to prefer Rowen. Pronunciation, however, is NOT like Rowen with an a at the end, but with a long e and an emphasis on the middle syllable.. She was on the popularity list until 1963, several years in the Top 500.

Rowena

This unusual Welsh mythological name just might appeal to architect parents wishing to honor Frank Lloyd Wright, who called his two famous residences Taliesin and Taliesin West. 

Taliesin

Tristan -- known through medieval legend and Wagnerian opera -- has a slightly wistful, touching air. This, combined with the name's popular "an" ending, makes Tristan very appealing to parents seeking a more original alternative to Christian.
 One influence was the character Tristan Ludlow played by Brad Pitt in the 1994 movie Legends of the Fall, based on a Jim Harrison novel.
 Tristan is a dragon-slaying hero of Celtic legend, whose story was incorporated into Malory's Le Morte d'Arthur, in which Tristan is one of the Knights of the Round Table, consumed by his doomed love affair with Queen Isolde. Wagner set the story to music in his opera Tristan und Isolde.
 Tristan and its alternate form Tristram have been found in later lit as well. Tristram Shandy is a famous early comic novel by Laurence Sterne (in which the hero's father calls Tristram the worst name in the universe); Tristan is a major character in James Herriott's All Creatures Great and Small, and there is an eponymous novella by Thomas Mann.
 Particularly popular in Canada, Tristan was chosen for their sons by Travis Tritt, Wayne Gretzky, Natasha Henstridge and, most recently, by Elsa Pataky and Chris Hemsworth. Basketball player Tristan Thompson hails from Canada.
 Other variants of Tristan include Tristen, Tristin, Triston and Tristian.

Tristan

Too close to the name of a bodily fluid. 

Urien

Uther 

Vivienne is an elaborated Gallic version of the name Vivian, chosen first by Rosie O'Donnell for her daughter and then catapulted to superstardom when Brad Pitt and Angelina Jolie used it for their twin daughter. An adult namesake is the British designer Vivienne Westwood. Rosie O'Donnell also has a daughter named Vivienne, known as Vivi.
 
The actress who played Scarlett O'Hara spelled her name Vivien (Leigh), but was born Vivian.

Vivienne

Variation of Isolde, the name of a great Celtic heroine. The mononymous French singer Yseult is the most notable bearer today.

Yseult

starsandstripes's list "Arthurian Theme Names" of 58 great name ideas: Alistair - Yseult!

Arthurian Theme Names

List of names you would find in the Legends of King Arthur, and also some others that just seem to fit in with the theme!