Delta is an unusual vintage option, blending the sounds of Della and Etta. The fourth letter of the Greek alphabet and a geographical term, used to describe an island formed at the mouth of a river, some may be put off by Delta's links the airline company of COVID variant on the same name.

Like Ray, a formerly funky nickname name that is newly cool. Comedian Amy Schumer used it for her son.

Noam is an underused modern Hebrew name with any number of attractive attributes attached to its meaning; it doesn't have the biblical weight of Noah, but could make a more distinctive alternative to that popular choice. Noam is a Top 10 boys' name in Israel.

Jupiter's partner Juno has entered the mainstream, so it's possible that her divine mate could follow. But not necessarily for boys — Jupiter is currently mostly female in the US, thanks to its similarity to Juniper. Stars including Ed Sheeran and Ashley Tisdale recently welcomed daughters named Jupiter, which could shift the balance even more towards the girls.

Dalton is a name with multi-faceted appeal. Many are attracted to the name's resemblance to other two-syllable n-ending favorites: Colton, Holden, and cousins. Others see it as a trendy Western name, recalling the legendary Dalton Brothers gang. It also has something of an upscale, preppy feel connected to the exclusive New York private school.

Theon, an ancient name attached to a noted Greek teacher of mathematics and astronomy, also father to the first woman mathematician, might appeal to parents in this field. You can think of Theon as Theo with something a little extra.

Pronounced "TAHL-a-mee," this was the name of one of Alexander the Great's generals and several Greco-Egyptian rulers, as well as the name of a famous Greek astronomer. Actress Gretchen Mol brought it into modern times when she chose it for her baby.

The astronomical Polaris is better known as the North Star, the brightest star in the Ursa Minor constellation. It's also the name of a character in the Marvel Universe, the daughter of Magneto.

Another astral name, this one relating to one of the largest and brightest stars in the heavens, is popular in Scandinavia and Spain, where it ranks among the Top 50 girls' names. Although still very rare in the US, we think it has serious potential to follow the likes of Luna and Lyra up the charts.

Archimedes of Syracuse was a famous Ancient Greek thinker, especially in the fields of mathematics and sciences. He made important contributions to geometry and calculus. His name was a perfect choice, meaning "master planner" or "master thinker".

Even among the range of blue names on the current baby naming palette -- Blue itself, Azure, Cerulean, Teal, Aqua, Cyan, Indigo -- Cobalt remains the most unusual, not to mention the most masculine.

In an epic poem, the personification of truth, beauty, and unity; this ancient name is popular in several European countries but less common in the US. The Oona spelling is slightly more popular but Una sleeker.

Ether is an uncommon feminine name derived from scientific and philosophical concepts rather than traditional naming conventions. The word 'ether' historically referred to the fifth element in ancient and medieval science, thought to fill the upper regions of space. It was considered the material that made up the heavens and celestial bodies. The name evokes ethereal qualities—lightness, elegance, and otherworldliness. In modern contexts, it might appeal to parents drawn to scientific terminology or abstract concepts as naming inspiration. While quite rare as a given name, Ether offers a distinctive choice with philosophical depth and celestial associations, fitting among other element-inspired names but with a more mystical quality.

The name of the great Renaissance astronomer and mathematician, Galileo would make a distinctive hero-name for the son of parents involved in those fields. Deriving from Latin and Hebrew, it refers to someone from Galilee, a Biblical place name associated with Jesus's miracles in the New Testament.

Hildegard is an ancient name that sounds it, but it does have sweet short forms Hildie and Hilda to recommend it, as well as several illustrious historical bearers.

Acacius is a Latinized form of the Ancient Greek Akakios and can be interpreted to relate to the same root as the name Acacia, for the thorn bush, or Akakios which means "not evil." With the modern taste for ancient names that end in "us," this obscure but attractive choice may have a chance of new life. Acacius is the name of three early saints.

Penrose – an ancient locational surname derived from several villages in Cornwall, Wales, and the Welsh border country of England – might work as a first name, although the "Rose" syllable might lead the uninitiated to assume it's a female name. As a middle name, however, it would make for a surprising and distinguished choice. A male Penrose could be called Pen/Penn, Ross or Roe for short.

A family of lawyers might be interested in this surname as a tribute to famed defense attorney Clarence Darrow.

Cool and edgy but with a gentle sound, Elion is likely a variation of Elyan, Elian, or Elias. Chosen for just 15 boys in 2023, it more than quadrupled in use in 2024 when it was given to 70 babies.

Sky may be a bit hippie-ish, but it's bright and sunny nonetheless. Sky rejoined the Top 1000 in 2013 after spending many years off the list. Sky was the choice of magician David Copperfield for his daughter, born in 2010.