Scottish Gaelic, possibly from an earlier name Aithbhreac, "new speckled one".

Variously Anglicized as Africa, Erica, Efric, Effie, Euphemia, and a large number of other variants [see the Clan Maclean website]. ONC also gives Henrietta and its derivative Harriet as Anglicized forms of Oighrig. However Whyte gives Eiric as the Gaelic equivalent of Harriet.