Castiel, which vaulted into the Top 1000 on the wings of the angel hero of the television show Supernatural, is the name of the Angel of the day Thursday. It may also derive some appeal from the newly-fashionable "Cas" syllable, as in Cassian and Cassius.

Morwenna is an ancient Cornish name now being revived in Wales, deriving from a Celtic word meaning "maiden", although the Mor- syllable means that it's often associated with the sea. It's been heard in the British series Doc Martin and Poldark. Morwenna Banks is a British actress.

Rarely heard in the US, Auberon has a gentle autumnal feel rare in a male name. A Shakespeare-adjacent choice, Auberon started out as as a pet form of Auberi, the French form of German Alberich.

Altalune is an invention used by Uma Thurman and Arpad Busson as one of several middle names for their daughter. It's evocative Latin meaning roughly translates to "over the moon." Celebrity baby Altalune will be called the more familiar Luna for short.

One of Dumas' swashbuckling Three Musketeers, now better known as a men's cologne.

An unusual Gwyn name with a lovely meaning, this compound name pairs Gwyn with the name Eira, meaning "snow". A relatively modern creation, it remains very rare.

This early Welsh saint's name is unusual and lovely, waiting to be discovered. Saint Arianell was a member of the Welsh royal family who was possessed by a spirit which was exorcised by Saint Dyfrig, who became Arianell's spiritual teacher.

An attractive enough name, but for die-hard Star Wars fans only.

Illyria can trace all its varied associations to the name of an ancient place in the western part of the Balkan peninsula, also called Illyricum. Its inhabitants, conquered by the Romans in 168 BC, were called the Illyrians. Its mythological ancestor was Illyrius, a demigod and son of King Cadmus and the goddess Harmonia.

Osias has a Latinate and biblical feel without making an appearance in the Bible. The related Ozias, on the other hand, is a form of Uzziah, found in the Greek and Latin Old Testament, and could make a distinctive path to the nickname Oz or Ozzie--both far cooler, in our opinion, than Oswald.

Ambrosia combines some of the more whimsical qualities of more popular Aurora and Isabella, with a heavenly meaning.

Cadmus is the name of the serpent-slaying hero of Greek mythology who also founded the city of Thebes and is credited with inventing the alphabet. Its ancient feel might appeal to modern parents — especially since Cadmus Peverell is a human Harry Potter character, one of the three original owners of the Deathly Hallows.

This name feels warmer and more human-appropriate in its longer version, but still retains that breezy feel. Trivia tidbit: Zephyrinus was a Jewish pope.

Bright and vibrant but elegant too, Estrella is a rising star among Hispanic families that would make a good cross-cultural choice too. A Spanish word name that literally means "star", it is similar to other popular names with the same stellar meaning such as Esther and Stella.

This ephemeral name of the loving angels surrounding the throne of God is all but unheard of in the US, although its feminine forms Seraphine and Seraphina are catching on. In Russia, it's long been in use, spelled Серафим (Serafim).

Sad tinge to the name of the beautiful German city firebombed during World War II. Its name derives from Sorbian drezga, meaning "forest".

Cassiane, also spelled Kassiani or Kasiani, is an ancient Greek name best known as the name of a saint famous as a hymnographer. The Hymn of Cassiane, traditionally sung on Tuesday of Easter Week in the Greek Orthodox Church, is associated with fallen women. The 9th century saint Cassiane was supposed to be in love with the Emperor Theophilos, who rejected her when she proved to be more intelligent than he.

Araluen is a beautiful Aboriginal Australian place name, used in several sites, always connected to the dainty water lily.

Esylt is a feminine name of Welsh origin, being a variant spelling of Essyllt or Esyllt, which is the Welsh form of Isolde (or Iseult). The name is prominently featured in Arthurian legend and Celtic mythology as the Irish princess in the tragic love story of Tristan and Isolde. The Welsh pronunciation typically emphasizes the first syllable (ES-ilt). While maintaining deep connections to Celtic heritage and medieval romance, this particular spelling remains extremely rare even in Wales. The name carries associations with tragic beauty, forbidden love, and ancient Celtic traditions. Its unusual spelling and mythological connections make it an intriguing choice for parents seeking a name with strong cultural roots and literary significance while remaining distinctly uncommon.