Dictionary of Medieval Names
from European Sources

Isenbern m. Old Saxon, Old High German īsarn 'iron' + Old High German, Old Saxon bero 'bear'.

Austria
Latin
c1050 Isinbero (nom) UrkStyria 58
England
Latin
1189 Isebernus (nom) GASurv p. 109
Cite as: S.L. Uckelman. "Isenbern". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2020, no. 1. http://dmnes.org/2020/1/name/Isenbern.