Altmann \a-ltma-nn, al(t)-mann\ as a boy's name is a variant of Altman (Old German), and the meaning of Altmann is "old man".

The baby name Altmann sounds like Eltman and Waltham. Other similar baby names are Altermann, Aldwynn, Aldan, Aldwinn, Alterman, Alton and Alten.