Etymology and meaning of MORRIS

1- Dark, swarthy 2- Possibly a modern form of the ancient Irish name "O'Muirgheasa".

Published Information
(origin: Welsh.) From Mawr and rys, a hero, a warrior, a brave man. Marth, the great, the warlike, same as Mavors.

Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import (1857).