Dictionary of Medieval Names
from European Sources

Ermentar m. Old High German ermen, Old Saxon irmin 'great, strong' + a meaningless element.

The name is a Gallo-Frankish creation.

France
Latin
c823 Ermentarius (nom) irminon-vol2 26, Palatiolum
Cite as: S.L. Uckelman. "Ermentar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Ermentar.