Dictionary of Medieval Names
from European Sources

Gislilde f. Old High German gīsal 'pledge, hostage' + Old High German hiltja 'battle'.

France
Latin
c823 Gislildis (nom) irminon-vol2 a, Palatiolum
Cite as: S.L. Uckelman. "Gislilde". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Gislilde.