Dictionary of Medieval Names
from European Sources

Frotmund m. Old Frisian, Old Saxon frōd, Old High German fruot 'wise' + Old Saxon mund, Old High German munt 'hand, protection'.

France
Latin
1067x1086 Frotmundus (nom) CartNDSaintes XIV; 1070 Frotmundus (nom) LDS appendix, XXIX
Cite as: S.L. Uckelman. "Frotmund". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Frotmund.