The first name Niall is of Scottish, Celtic, Gaelic, English, Irish, Celtic/Gaelic origin. It is often a boy or girl name. It has the following meaning(s):
Scottish: A Borrowing from the Irish, Niall is a Very Old Yet Still Popular Gaelic Name of Debated Meaning. Some Believe it is Derived from Niadh (A Champion). Others Think it is from Neall (Cloud). (Ni-ahl)
Celtic: Champion
Gaelic: Champion
Scottish: Champion
English: Champion. A Dynasty of Irish Kings Was Founded by Niall of the Nine Hostages
Irish: Variant of Neill: Champion. A Dynasty of Irish Kings Was Founded by Niall of the Nine Hostages
Neil(English) Anglicized Form of the Gaelic Niall, a Name of Debated Meaning. Some Believe it is Derived from Niadh (A Champion). Others Think it is from Neall (Cloud). Variations: Neal, Neill, Niel, Niell. (Neel)