 A family manuscript of later date claims the Cotters are descendants of Óttar of Dublin (Son of Mac Ottir), who was King of Dublin from 1142 to 1148, through his son Thorfin and grandson Therulfe.This is not impossible, nor even improbable, but currently remains unverified, the greater part of the history of the Norse in Ireland, and especially those in Munster, being lost.The Gaelic Mac Coitir was originally "Mac Oitir", literally meaning "Son of Óttar", but by common Irish and Scots usage implying a 'descendant of Óttar'.