Dictionary of Medieval Names
from European Sources

Lothgar m. Old High German hlūt, lūt, Old Saxon hlūd from Proto-Germanic *hlūdaz, *hlūþaz 'loud; famous, renowned' + Old High German, Old Saxon gēr 'spear'.

France
Latin
c1030 Lothgerius (nom) StVdM-II 714; 1040x1080 Lothgerius (nom) ibid. 664
Cite as: S.L. Uckelman. "Lothgar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Lothgar.