Dictionary of Medieval Names
from European Sources

Lothar m. Old High German hlūt, lūt, Old Saxon hlūd from Proto-Germanic *hlūdaz, *hlūþaz 'loud; famous, renowned' + Old High German heri 'host, army'..

The name of a 6th C king of the Franks, two 7th C kings of the Franks, an 8th C king of the Franks, a 9th C Holy Roman Emperor and king of Italy, a 9th C king of Lotharingia, a 10th C king of Italy, a 10th C king of the Franks, and a 12th C Holy Roman Emperor.

The name was sometimes conflated with Lothar.

France
Latin
c550 Clotharius (nom) DCEL-2 Add. I; 628 Chlotarii (gen) ibid. CCXLIV; 657 Clotario (abl) ibid. CCCXXVIII, Clotarius (nom) ibid. CCCXXIX, Clotharii (gen) CartYonne1 VI; 658 Chlotario (abl) DCEL-2 CCCXXXIII
Germany
Latin
842 Hlotharii (gen) HambUrk-vol1 X; 844 Lotharij (gen) quix-vol1 2; 855 Lotharij (nom) ibid. 3, Lotharius (nom) ibid. 3; 864 Hlohario (abl) HambUrk-vol1 XVI; 884 Lotharius (nom) quix-vol1 2; 888 Lotharij (gen) ibid. 5, Lotharius (nom) ibid. 5; 930 Lotharii (gen) ibid. 10; 966 Lotharij (gen) ibid. 13, Lotharius (nom) ibid. 13; 1114 Liutherii (gen) UrkStyria 100b, Lotharii (gen) ibid. 99; 1125 Lotharii (gen) ibid. 109; 1130 Lotharii (gen) ibid. 121, Lothario (abl) quix-vol1 63; 1134 Lotharii (gen) ibid. 97, Lotharius (nom) ibid. 97; 1135 Lothario (abl) ibid. 64; 1136 Lotharii (gen) ibid. 98, Lothario (abl) ibid. 80, Lotharius (nom) ibid. 98; 1137 Lotharii (gen) ibid. 102, Lotharius (nom) ibid. 102
Italy
Latin
1189 Lothario (dat) ChStBo1 I, Lotharium (acc) ibid. I, Lotharius (nom) ibid. I, Lotherius (nom) ibid. I
Cite as: S.L. Uckelman. "Lothar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Lothar.