* As an English surname, from a Middle English short form of David. Also a nickname from the (jack)daw. Compare Davey, Dakin. * Also as an English surname, from a rhyming pet form of Raw, a name related to Rauf; compare Ralph, Rawe, Rawson, Dawkins, Dawson. * As an Arabic surname, from ضوء (“light”). * As an Irish surname, from Ó Deaghaidh (literally “descendant of Deaghadh”), from deag (“good”) + ádh (“fate”), comparable to Goodwin.

Etymology: Wiktionary (CC-BY-SA)