Gilduin, Gelduin or Geldwin may refer to:
Gelduin of Saumur (), father-in-law of Hervé I, Count of Perche (died 1049), archbishop of Sens (died 1077), elected archbishop of Dol, saint Gelduin of Anchin (died 1123), abbot, correspondent of Anselm of Canterbury and saint Gilduin of Le Puiset (died 1130/5), abbot of Saint Mary of the Valley of Jehosaphat (died 1155), abbot of Saint-Victor and confessor of Louis VI of France Gelduin I (died 1137), lord of Combourg Geldwin, father of Bishop Savaric FitzGeldewin (died 1205) Gelduin II (died after 1235), lord of Combourg
See also Hilduin (disambiguation)