Arianrhod -Arianrhod is the mother of Llew and sister of Gwydion of Welsh lore. The name means "silver circle" and the Welsh name for the Corona Borealis is "Caer Arianrhod" or Castle of Arianhrod.
Arthur -Arthur is a name from British legend. It means bear, or possibly stone.
Arwen -Arwen is a Welsh name meaning "fair" or "fine".
It was also the name of a character in J.R.R. Tolkein's Lord of the Rings.
Ashley -The name Ashley is of Old English origin and means "Ash wood". It was originally a male name, but now both boys and girls wear it.
Audrey -Audrey is a name of Old English origin meaning "Noble Strength".
Aveline -Aveline is a name of Norman French origin. It means "little bird" or perhaps "desired".
Avery -Avery is a name of both French and English origin. It means "Elf council".
Baird -The name Baird is of Gaelic origin. It means "poet", "singer" or "songwriter".
Brian -Brian is a name of Gaelic origin meaning "noble, strong, virtuous" and perhaps "hill" with the idea of one being raised up or exalted.
Conversely, the word brian also means "maggot" in Old Provical/Occitan
Brianna -Brianna is a name of Gaelic origin meaning virtuous, strong, noble and hill
It is the feminine form of the name Brian
Bridget -Brigid is a pan-Celtic fire Goddess honored by many modern Pagans and Heathens. And the popular St Brighid of Ireland. The name means "exulted one"
Bronwyn -The name Bronwyn is of Welsh origin and it means "white breast".
Cameron -Cameron is a Scottish name from the Gaelic cam sron meaning "crooked nose". Someone who has a crooked nose is probably a fighter.
Ceridwen -The name Ceridwen is a female name of Welsh origin. She was the mother of the bard Taliesin in welsh lore. The name Ceridwen means "blessed song".
Craig -The name Craig is a boy's name of Gaelic origin meaning "cliff" or "rock".
Daren -Daren is a Welsh name meaning "burnt land" or "hill"
Dylan -Dylan is a Welsh name whose meaning is connected to the word for "sea".
Dylan was a Welsh sea spirit, son of Arianrhod and Gwydion
Eavan -Eavan is an Anglicized version of the Irish/Gaelic name Aoibheann which means "beautiful"
You left off "Cory" which is pretty darned Celtic! lol
I was the only one in Catholic school without a saint's name and a nice nun told me I could be "St. Cory" one day… but I "drifted" and became a nice Pagan boy. lol