Submitted NameRevisions Save Type Surname Usage Scottish, Irish, English, Dutch (Anglicized), German (Anglicized) Other Forms FormsDau, Douw, Daw, McDow Edit Status Status [show contributorshide contributors] Added 1/22/2016 by Lady_Skywalker Edited 6/10/2016 by LMS Meaning & History Scottish (also found in Ireland): reduced form of McDow. This surname is borne by a sept of the Buchanans.English: variant of Daw.Americanized spelling of Dutch Douw, an Old Frisian personal name.Americanized spelling of German Dau.