Penelope is an unlikely 21st century baby name success story. Off the Top 1000 for 25 years, Penelope jumped back on in 2001 and has been heading uphill ever since, propelled by the trend for mythological names, Spanish actress Penelope Cruz, and some high-profile celebrity babies.

Sweet and sparky, youthful yet long-established, this Scottish nickname for Margaret, Mairead, or Mary, entered the US Top 1000 back in 2014 and has been on the rise ever since, replacing the once popular Macy which peaked back in the 2000s. Game of Thrones star Maisie Williams helped propel the name back into the limelight, along with the that of her character, Arya, while singer Maisie Peters has helped keep it in the charts.

Helena is one of those classic names that just misses making the US Top 1000 girl names for its entire history, falling off for a single year in 1992. Since then it's been drifting lazily up the charts, and makes a perfect choice if you want a name that both fits in and stands out.

The name of the Roman goddess of the moon, Luna is derived straight from the Latin word for moon, luna. Luna may be the name most likely to surprise someone from an older generation by its Top 10 status in the US and its widespread international popularity.

Orla is an Irish name closely associated with the high king Brian Boru, as it was the name of his sister, daughter and niece. It was very popular in the Middle Ages – the fourth most popular name in twelfth century Ireland – and has become popular again in Ireland, Scotland, England and Wales today. In Irish, the name is commonly spelled Orlaith or Orlagh.

Michael was the Number 1 American boys' name for almost half a century. While Michael has moved out of the Top 10 baby boy names, it's still widely used.

Substantial, strong, and enduring, Anthony has remained a perennially popular name over the last century. With just a hint of playfulness and just a touch of clunky-coolness, Anthony is a versatile choice that seems comfortable anywhere.

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 is a retro feeling choice with literary charm.

Though ancient, Marcus now sounds more current than Mark, in tune with today's trend towards us-ending Latinate names.

Elvis naming his daughter Lisa Marie and Nat King Cole's hit song "Mona Lisa" conspired to catapult one of Elizabeth's many offshoots to a high of #4 in 1970.

Lorcan is a name rich in Irish history as belonging to several kings, including the grandfather of the most famous high king of Ireland, Brian Boru. Lorcan O'Toole, known in English as Laurence O'Toole, is the patron saint of Dublin, so it's not too surprising that Irish-born actor Peter O'Toole named his son Lorcan.

Although Greek in origin--in the fourth century, a bishop by that name established the principles of the Greek Orthodox Church--Basil for years took on the aura of aquiline-nosed upper-class Britishness of Sherlock Holmes portrayer Basil Rathbone, then spiced with the fragrant aroma of the herb that entered with the Pesto generation.

In the World War II era, Roger had nothing but the most positive associations, actually used by military personnel to mean 'Received and understood'--or A-OK, and though it is now on extended furlough, it does have a long and distinguished history. Introduced to England after the Norman Conquest of 1066, Roger soon became very popular there, with nicknames Hodge and Dodge, and had a long run later in the U.S, remaining in the Top 100 for 55 years.

Combining the mild and the innocent, this sweet and feminine name is worthy of a comeback, in the mode of Madeline and Cecilia. Its original, also attractive form is Melisende, which came from Germany to France and was borne by a daughter of Charlemagne.

One of the first breakaway unisex baby names, Terry, used independently since the days of Terry and the Pirates. Popular in the mid-20th-century, it has fallen out of favor in recent years, replaced by Tommy, Sonny, and Ozzy.

Marietta would make for a classy and uncommon long form for cool nickname Etta.

Most parents today call their Edwards Edward -- and we tend to think that's the right call. But it's worth noting that Eddie has been in the Top 1000 every year since records began in 1880; indeed, it was a mainstay on the Top 100 through the 1950s.

This ancient royal Scottish name and its equally-correct spelling French variation Stuart had a brief vogue in midcentury America--it was Number 286 in 1955--dropped off the list completely in the nineties.

Long in our category of so-far-out-it-will-always-be-out category, once seen as a gum-cracking 1940's telephone operator, we think it's time to reassess Myrtle, and look at is as a nature name, a plant with pink or white aromatic berries. Ruled by Venus, myrtle is a plant associated with love, peace, fertility and youth.

A rarely used last-name-first-name, never as popular as cousins Garrett or Derek.