Dictionary of Medieval Names
from European Sources

Ortmar m. Old English ord, Old High German ort 'point (of a spear or sword)' + Old English mære, Old High German, Old Saxon māri from Proto-Germanic *mērijaz 'famous'.

England
Latin
1222 Ordmarus (nom) StPaulDom p. 73
Cite as: S.L. Uckelman. "Ortmar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Ortmar.