Gwenonwy is a poetic and intriguing member of the Gwen- family, taken from a Welsh word for the flower, lily-of-the-valley. According to legend, King Arthur had a sister named Gwenonwy and there is a large rock in Wales known as Maen Gwenonwy named after her.

This Roman mythology name for the goddess of silence has the ancient Roman feel now coming into fashion, as boys begin to have names like Atticus and Aurelius.

God of war in Lithuanian mythology. According to legend, worshippers of Kovas would sacrifice black horses to him.

One of the Valkyries, still clad in heavy armor.

God of fertility in Latvian mythology. Jumis is responsible for ensuring a good harvest — he lives in the fields and the last of the crop would be left for him to live in.

The father of the legendary King Arthur, this name derives from the Welsh uthr meaning "terrible" — likely in the sense of inspiring fear. Also spelled Uthyr, the name has only appeared in the UK stats once, in 2001, when four boys were called Uther.

Ragnarök is a great future battle foretold in Norse mythology, which will lead to the ultimate destruction of many key deities and the rebirth of the Earth and mankind. The word is newly familiar to many thanks to the 2017 Marvel Comics film "Thor: Ragnarok".

Philophrosyne was the spirit of welcome, friendliness, and kindness in Greek Mythology. She was one of the four younger Charites.

Variation of Magni or Magnus, popular throughout modern Scandinavia. In mythology, Magni was a son of Thor.

Tyche is the goddess of luck and fate in Greek mythology. Her Roman equivalent is, fittingly, Fortuna.

In Slavic mythology, Živa is the goddess of life, fertility, and the Spring season. Viva and Vita are more familiar cognates.

This name of a Buddhist goddess, a possible alternative to the trendy Maya, was chosen for their daughter by Laura Dern and Ben Harper. Jaya is simple yet unusual, a winning combination, and one of the out-of-the-box goddess names as well as one of the most easily translated Hindi names for girls.

Kiwa, one of the most popular Maori names for boys in New Zealand, is the name of several ocean guardians in Maori mythology. It's part of a poetic name for the Pacific ocean.

The god of storms in Lithuanian mythology. With (unrelated) Audrey at the top of the girl name charts, Audros feels like a handsome masculine successor.

In Finnish mythology, Ahti (also known as Ahto) was a heroic character and god of the sea, rivers and fishing, also referred to as Saarelainen ("Islander").

Oengus is the old Irish form of the name most commonly found in the modern world as Angus, typically Scottish.
In Irish mythology, Oengus is the god of youth, love, and poetry.

Megaera is one of the Furies in Greek mythology — deities of vengeance. It's a better choice than Envy, which was given to 37 more baby girls than Megaera at last count.

In Roman mythology. Felicitas was the deity of good luck.

In Greek mythology, Tartarus rules over the depths of the underworld. Probably not the best role model for a little boy.