Dictionary of Medieval Names
from European Sources

Arnbert m. Old High German, Old Saxon arn 'eagle' + Old High German beraht, Old Saxon berht 'bright' from Proto-Germanic *berhtaz.

France
Latin
1058 Aramberti (gen) StVdM-II 694, Aramberto (abl) ibid. 694; 1179 Arembertus (nom) clairvaux-12thc 177
Switzerland
Latin
1235 Arnubertus (nom) CLC p. 46
Cite as: S.L. Uckelman. "Arnbert". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Arnbert.