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Dictionary of Medieval Names
from European Sources

Giseltrude f. Old High German gīsal 'pledge, hostage' + Proto-Germanic *þrūþ 'strength' or Proto-Germanic *trut 'maiden'.

France
Latin
c823 Gisledrudis (nom) irminon-vol2 8, CE
Cite as: S.L. Uckelman. "Giseltrude". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 1. http://dmnes.org/2016/1/name/Giseltrude.