Dictionary of Medieval Names
from European Sources

Giselhar m. Old High German gīsal 'pledge, hostage' + Old High German heri 'host, army'.

Czech Republic
Latin
1383 Gheiselerus (nom) LDFPUP1 p. 11
Estonia
Middle Low German
1436 Gyseler BbRT p. 358
France
Latin
c823 Gisleharius (nom) irminon-vol2 51
Latvia
Latin
1302 Gyselero (dat) RigSB 445
Poland
Middle High German
1329x1330 Gyeselhern (dat) SBGlatzer p. 2
Cite as: S.L. Uckelman. "Giselhar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Giselhar.