What is meaning of niall?

Niall is a Gaelic name which means "cloud", "champion", or "passionate". It is derived from the Old Irish word "niadh" which means "champion" or "warrior". The name Niall was popularized by the high kings of Ireland, particularly Niall Noígíallach (Niall of the Nine Hostages) who reigned in the 4th and 5th centuries. Niall is a popular name in Ireland and has gained popularity in other countries such as the United States, Canada, and Australia. Famous people with the name Niall include Irish singer Niall Horan and Irish footballer Niall Quinn.