Mac Amhlaoibh and Mac Amhalghaidh are two different Gaelic patronymic names with different origins and meanings, but which share the same or similar Anglicisations. These Gaelic names are borne by at least three unrelated native Irish clans or septs (a division or part of a clan). The Mac Amhalghaidh sept was historically centred at Ballyloughloe in Co Westmeath; the Mac Amhlaoibh sept of the MacCarthy family was centred at Newmarket; and the Mac Amhlaoibh sept of the Maguire family was centred in the barony of Clanawley in County Fermanagh.