Boy name origins & meanings Scandinavian : DayOld English : ValleyGerman : Valley dweller Boy name variations Dag Dagmar Dagney Dagny Dagget Dailey Daily Day Dayton Daymond Daeg Deegan Dale Dal Dallan Dallen Dallin Dallon Dalton Dalibor Daly Dayle Dawley Family name origins & meanings Irish : variant spelling of Daly.