-ian/-ien/-ion

Cool and charming, with plenty of flair and sophistication, Julian manages to strike the balance between being a sensible classic and contemporary choice. Appealingly international, it is no wonder Julian is a rising star.

One of the most romantic of appellations, Caspian is a geographical name referring to the large salty sea between Asia and Europe. It's also the name of the hero of C.S. Lewis's beloved Chronicles of Narnia, Prince Caspian.

Rugged but gentle at the same time, Cassian is a saintly and stylish choice that was derived from the name Cassius. Before 2017, it was an obscure choice, given to a tiny handful of boys each year. As of 2023, however, it's become one of the top ten fastest-rising names in the US, more than doubling in usage since 2022 and edging closer towards the Top 500.

Sebastian is an ancient martyr's name turned literary, and Little Mermaid hero—think Sebastian the Crab—that's more popular than ever, as a classic-yet-unconventional compatriot for fellow British favorites T Theodore and Oliver.

Lucian is a sleeker, more sophisticated version of Lucius that is climbing in tandem with other Lu-starting names.

Vivian, once an elderly lady name, is on the rise, along with all forms of girl names that mean life — from Zoe to Eva to those who share the vivid Viv syllable. It was one of the fastest-rising names of 2024, vaulting into the Top 100 in 2023.

Adrian is one of those names that’s easy to picture on all kinds of people. From an active and energetic five-year-old to your great grandpa, from the coolest, breeziest guy you know, to the quiet, serious one, it’s no wonder Adrian has always made the US Top 500 since the early 20th century.

Damian has sidestepped its demonic horror movie overtones, leaving a basically friendly and charming Irish image. A well-used upper-class name in England, it is growing in popularity here.

Gillian is a name that was in common usage in Great Britain until the 1970s, when it dropped out of the Top 100 and is yet to return. Until recently, it had not crossed the Atlantic in significant numbers, except in the short form Jill.

This name of a Roman emperor and of a sedating plant is still used quietly, given to about a dozen baby boys in the US last year. It has a strong, rhythmic sound and could make a modern-feeling honor name for grandma Valerie.

An underused classic that has proved surprisingly unisex over the last few decades, being given to roughly the same number of baby girls and boys in the US from the 1970s to the 2000s. For a girl, Marion has a sturdy old-fashioned charm.

Marian's (and sister spelling Marion's) image has gone through a sea change of late, recalling less middle-aged matron and more Robin Hood's romantic Maid Marian. Some influences: the SJ Parker-M. Broderick twin daughter Marion and the glamorous French actress Marion Cotillard.

Fabian is the ancient name of a saint and pope that also has Shakespearean cred as Olivia's servant in Twelfth Night and more recently made an appearance in Harry Potter. In the U.S. Fabian became best known via the 1960s teen idol/singer who went solely by his first name.

Most parents would find this old Roman name pretentious compared to the more accessible Adrian, but some history buffs just might want to commemorate the enlightened emperor.

Julien is the handsome French form of Julian, which derives from Julius, a Roman family name. Its origin is shrouded in history, but possible roots include Latin iuvenis, meaning "youthfu"; Greek ioulos, meaning "downy-bearded"; or Jovis, a form of Jupiter, which means "sky father".

With the new trend of boys' names rising on the heels of their popular sisters, the unusual-yet-familiar-feeling Emilian might become better known thanks to its relationship to Emily and Emilia/Amelia. Rather than being two branches of the same tree, Emilian and Emily are actually one tree while Emmett and Emma hang on a whole separate tree. But all have a lot of modern appeal, and Emilian may be a more attractive and intriguing male form than Emil. There was a St. Emilian.

A name that sounds both arty and rough-and-tumble, Bastian can be used as either a short form or a stand-alone variant of elegant Sebastian. Also spelled as Bastien, Bastiaan, and Bastían, it notably appears in the German fantasy children's book, The Neverending Story , which features a young boy character called Bastian Balthlazar Bux.

Fun fact: Marion was the birth name of movie star John Wayne. Although commonly thought of as a female name today, it was actually more popular for boys until the late 19th century, and was given to roughly equal numbers of boys and girls throughout the 1970s-2000s.

This spelling variation of Adrian was popular in France and Belgium during the 80s, 90s, and early 2000s, peaking in 1991 when it reached the Top 20 in France. While it has since declined in use, it remains a familiar choice in French speaking countries.

The Darien spelling, which relates to the posh Connecticut town, peaked at Number 393 in 1994 but more recently has been just hanging on at the bottom of the Top 1000. Still, a name with an appealing sound and feel that may ascend again.