The story
* As an Irish surname, shortened from MacHood, from Ó hUid (“descendant of Ud”), in which Ó (“descendant”) has been replaced by mac (“son”). "Ud" is of uncertain origin, but could be a Gaelic rendering of an Old Norse name such as Óðr. Compare Hood. * As an English surname, variant of Maude.
Etymology from Wiktionary, CC BY-SA 4.0.