Dylan is a Welsh male given name. Meaning "son of the sea", "son of the wave", or "born from the ocean". Dylan ail Don was a character in Welsh mythology, but the popularity of Dylan as a given name in modern times arises from its use by poet Dylan Thomas.
Strong-willed warrior and protector. It's a shorter form of the Irish name Uilliam, which originated from the Frankish Willahelm, meaning "helmet of will." It's also a shortened version of "William." Well-known Liams: actors Liam Neeson and Liam Hemsworth.