Meaning: Its source is a Welsh expression meaning "Like a lion."

Languages: This boy's name is used in Welsh.

Narrative: The debate over the meaning of this name focuses on its first syllable. If, like the Welsh name Lleu, it derives from the name of an ancient Celtic god, it might mean ''shining one.''

The meaning given here assumes the contrary position that, like the Welsh name Llew often used as its nickname, Llewelyn refers to the king of beasts.