Esquinart held a degree in Medicine. He treated Charles d'Orleans in his last illness (1464-65). He lived in Angers and treated King René (who was also Count of Provence) and his wife Jeanne de Laval. He was Canon of Le Mans, Seneschel of St. Martin of Tours, and secretary and notary to Charles VII. Ernest Wickersheimer (1979). Dictionnaire biographique des médecins en France au Moyen Âge (in French). Geneva: Librairie Droz. p. 397. ISBN978-2-600-04664-0. Albanés, pp. 750-752. Eubel, II, p. 239.
J.-D. Mansi (ed.), Sacrorum conciliorum nova et amplissima collectio, edito novissima, Tomus XVIII (Venice: Antonius Zatta 1773), pp. 95-96.
Bishop Gerardus is first mention in an act of January 1110, in which the Countess Adelaide granted him half of the castle of Forqualquier. Gerard took part in the Council of Vienne in 1124. J.-D. Mansi (ed.), Sacrorum Conciliorum nova et amplissima collectio, editio novissima, Tomus XXI, p. 318. Fisquet, p. 42. Albanès, pp. 701-702.