Dictionary of Medieval Names
from European Sources

Hildeger m. Old High German hiltja 'battle' + Old High German, Old Saxon gēr 'spear'.

Estonia
Middle Low German
1440 Hilger BbRT p. 362
France
Latin
c823 Hildegarius (nom) irminon-vol2 26, Palatiolum, Hildegerus (nom) ibid. 110, Palatiolum; 1029x1033 Hildegarius (nom) CartStPC XII; 1047x1061 Hilgerius (nom) CartNDSaintes XX; 1101x1120 Hildegarii (gen) CartStPC XXIV, Hildegarium (acc) ibid. XXIV, Hildegarius (nom) ibid. XXIV; 1107 Hildegarius (gen) ibid. XVII; 1147 Hildierio (abl) clairvaux-12thc 14, Hildierius (nom) ibid. 14, Ildierius (nom) ibid. 19; 1147x1162 Hildierii (gen) ibid. 44, Hildierius (nom) ibid. 44; 1163 Hyldierii (gen) ibid. 99
Germany
Latin
1191 Hildegerus (nom) quix-vol1 38
Latvia
Latin
1286 Hildegaro (dat) RigSB 4; 1287 Hildegero (dat) ibid. 214; 1289 Hildegero (dat) ibid. 216; 1290 Hildegero (dat) ibid. 226; 1300 Hildeger (nom) ibid. 408
Scotland
Latin
1095 Ilgero (abl) ESC XV
Cite as: S.L. Uckelman. "Hildeger". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Hildeger.