Hastings is a surname of English and Irish origin, and is used also as a given name.
As a surname Hastings may sometimes be a patronymic surname from the Anglo-Norman personal name Hasting (also Hastain), but is usually a toponymic surname from Hastings in Sussex.
[1] Separately also a common surname in Connacht Ireland, where it is thought to often be a rough phonetic Anglicization of the Irish Gaelic sept of Ó hOistín who were followers of the MacDermots of Moylurg,[2] first Anglicized as Hestin and Histon, then later Hastings.
[3][4][5] John O'Hart in his work "The origin and stem of the Irish nation" published 1892, states the Irish Hastings origin is from the ancient Irish Gaelic name O'h-Uisgin,[6] other possible Irish sources may derive from a Norse Gaelic personal name Oistín or a phonetic version of Ó hOissín another old Connacht Irish surname, a family name that can sound regionally similar when said in original Irish.
This family are most prominent in County Mayo, County Limerick, County Kerry and County Clare.