Doug \doug\ as a boy's name is a variant of Douglas (Scottish, Gaelic), and the meaning of Doug is "black river".

The baby name Doug sounds like Dag and Daeg. Other similar baby names are Drue, Dru, Deus, Doan, Dodge, Dod, Dom, Don, Donn, Dor, Dore, Dougal, Dov, Dow, Dowe, Dougan, Dory and Rog.