Mannus, according to the Roman writer Tacitus, was a figure in the creation myths of the Germanic tribes. Tacitus is the only source of these myths.
Engraving of the three sons of Mannus (Carl Larsson, 1893): Ingui plays with a model ship (the Ingaevones lived by the sea); Irmin wears a helmet and sword (the Irminones were famed as warriors); Istaev/Iscio digs in the earth and has a toy horse (the Istvaeones were horsemen and farmers).