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.

Griffin is one of the newer and most appealing of the two-syllable Celtic surnames. In English, griffin is the name of a mythological creature, half eagle, half lion. It re-entered the list in 1983 after an absence of 75+ years.

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.

Magical and earthy, sophisticated but off-beat, Persephone appears as the daughter of Zeus by Demeter in Greek mythology. After she was kidnapped by Hades to be Queen of the Underworld, it was decreed by Zeus that she would spend six months of the year with her mother, allowing crops to grow, and six in mourning, thus accounting for the change of seasons. As such, she is both the goddess of the Underworld and of Spring.

Melodic and beautiful but with a touch of sass, Calliope is the name of the muse of epic poetry — and perhaps less glamorously, the musical instrument on the merry-go-round. Bold and creative, it debuted in the US Top 1000 in 2016, and in more recent year, IT appeared in the Top 500.

Also spelled as Kalliope — the more traditional Greek transliteration — Calliope means "beautiful voice", making this a musical and poetic choice. It was rarely heard in the US until the 2000s when Calliope "Callie" Torres from the show Grey's Anatomy helped introduce it to a wider audience.

Xavier originated is use as a given name after Saint Francis Xavier, cofounder of the Jesuit order, who got his name from the Spanish-Basque village where he was born. His birthplace was Javier, the name of which was derived from the Basque place name Etxeberria, meaning "castle" or "new house."

Orion is a rising star, with both mythical and celestial overtones.

Magical and distinctive but grounded and familiar too, it's no surprise that Athena has become one of the most widely used ancient goddess names in the contemporary Western world. Derived from the city name Athens, it is current a Top 100 choice in the US.

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.

Portia is a perfect role-model name, relating to Shakespeare's brilliant and spirited lawyer in The Merchant of Venice, and is now also a Hunger Games name .

She was queen of the Greek gods, both sister and wife to Zeus, but the name of her Roman counterpart Juno has become much more fashionable these days. That said, we think Hera has possibilities today too, as so many ancient goddess names rise to prominence.

The name of the great Homeric hero with the vulnerable heel, Achilles is more popular in its international form, Achille, which is popular in France, Italy, and Belgium. This variation did however appear briefly on the US Top 1000 list in 2015, perhaps owing to its similarity to the likes of Atticus, Adonis, and Apollo. It has declined in use since then, but is nevertheless chosen for around 160 babies each year.

Also relating to the sea and the islands, this name is a bit more melodic than its cousins.

Parthenia may be a bit unwieldy, but does conjure up majestic images of the Parthenon. It was briefly in the US charts in the late 19th century.