Dictionary of Medieval Names
from European Sources

Isambert m. Old Saxon, Old High German īsarn 'iron' + Old High German beraht, Old Saxon berht 'bright' from Proto-Germanic *berhtaz.

France
Latin
c823 Isembertus (nom) irminon-vol2 19, Ved; 1030 Isimbardus (nom) StVdM-II 682; 1047 Isemberti (gen) CartNDSaintes II; 1067 Isembertus (nom) ibid. XII, Isenbardus (nom) ibid. XII; 1131 Isemberto (abl) ibid. XXII; 1179 Ysembardo (abl) clairvaux-12thc 181; 1261 Ysembardus (nom) ArrestReg-volI IX, BMV
Old French
1292 Ysambart (obl) HistHdVParis p. 113; 1296 Yzambart paris1296 p. 25, Yzambert ibid. p. 25; 1313 Isambart Paris1313 p. 17, Ysembart ibid. p. 76
Middle French
1392 Ysembert MemBret-II col. 605; 1418 Ysambert HGParis p. 379, Ysembert DdB1418 p. 204; 1421 Ysambart favier 523
Italy
Latin
1310 Ysembardus (nom) MonRav-2 CCCL
Cite as: S.L. Uckelman. "Isambert". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Isambert.