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Dictionary of Medieval Names
from European Sources

Hademar m. Old High German hadu 'battle' + Old High German, Old Saxon māri from Proto-Germanic *mērijaz 'famous'.

Austria
Latin
1237 Hademarus (nom) hennes-vol1 96
Germany
Latin
925 Hadamar (nom) UrkStyria 14; 948 Hadumari (gen) HambUrk-vol1 XXXV; 1222 Hadamarus (nom) hennes-vol1 62
Cite as: S.L. Uckelman. "Hademar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2018, no. 1. http://dmnes.org/2018/1/name/Hademar.