Gundoildef.Old High Germangund 'war, battle' + Old Frankishwildis, a development from names with a prototheme ending in -u and deuterotheme Old High Germanhiltja 'battle'.
Cite as: S.L. Uckelman. "Gundoilde". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2023, no. 1. http://dmnes.org/2023/1/name/Gundoilde.