Hildegar

Other forms are Hilger, Hildegarius, Hildegerus, Hilgerius, Hildegarii, Hildegarium, Hildierio, Hildierius, Ildierius, Hildierii, Hyldierii, Hildegaro, Hildegero, Hildeger, Hildigerus, Hildigaeri, Hildigeri and Ilgero. (Source: S.L. Uckelman. "Hildeger". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2023, no. 1. http://dmnes.org/2023/1/name/Hildeger)