Dictionary of Medieval Names
from European Sources

Hartmut m. Old Saxon hard, Old High German hart 'strong, hard' + Old High German muot 'spirit; courage, boldness'.

Germany
Latin
1218 Hartmudus (nom) hennes-vol1 30; 1225 Hartmodus (nom) ibid. 67; 1253 Hartmudus (nom) ibid. 145; 1281 Hartmudus (nom) UrkHeil1 31a
Middle High German
1293 Hartmut (nom) UrkHeil1 53, Hartmuͦt (nom) ibid. 51
Cite as: S.L. Uckelman. "Hartmut". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Hartmut.