Type Word Usage Old Germanic (Hypothetical) Meaning & History Germanic word meaning "mouse" [1][2]. Related ItemsFamily Tree·Details Other Languages & Culturesmus(Anglo-Saxon) mus(Old Dutch) mus(Old High German) Surname DescendantMaus(German) Same Spellingmus Sources & References Kroonen, Guus. Etymological Dictionary of Proto-Germanic. Brill, 2013, page 379. Orel, Vladimir. A Handbook of Germanic Etymology. Brill, 2003, page 278.