Dictionary of Medieval Names
from European Sources

Ermo m. A pet form of any of various names beginning with Old High German ermen, Old Saxon irmin 'strong', or the same element used as a standalone name.

France
Latin
658 Ermeleno (abl) DCEL-2 CCCXXXI, Ermelenus (nom) ibid. CCCXXXI
Cite as: A. Brown, S.L. Uckelman. "Ermo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2020, no. 1. http://dmnes.org/2020/1/name/Ermo.