Weir

As an English and Scottish surname, from the noun weir. Compare Wear, Ware.

Sometimes also a French surname, perhaps a version of Norman de la Were (“of the war”), see Warr. There is also the placename Wierre-au-Bois in Pas-de-Calais.

As an Irish surname, shortened and Anglicized from Mac an Mhaoir (“son of the steward”), see McNair. Also sometimes Anglicized from erroneous translations of names such as Ó Corra, Ó Comhraidhe, see Corr and Curry.