Does anyone know the origin of the first name Niamh or the last name Casey?

I found this site a couple months ago when my sister was trying to name her baby. It has the definitions of names from around the world. Hope it helps.


NIAMH
Gender: Feminine

Usage: Irish, Irish Mythology

Pronounced: NEEV [key]

Means "bright" in Irish. She was the daughter of the sea god in Irish legends. She fell in love with the poet Oisin, son of Fionn.



CASEY
Gender: Masculine & Feminine

Usage: English

Pronounced: KAY-see [key]

From an Irish surname which was derived from Ó Cathasaigh meaning "descendent of Cathasaigh". The name Cathasaigh means "vigilant" in Gaelic. Casey also serves as a form of CASS (feminine).

Does anyone know the origin of the first name Niamh or the last name Casey?
Thanks for sharing!Like Niamh the best.