Saint Eoaldus or Eoldus (; died around 716) was bishop of Vienne in the very late 7th century and the early 8th century,Louis Duchesne, Fastes épiscopaux de l'ancienne Gaule. Provinces du Sud-Est (tome premier), vol. 3, Paris, Thorin et fils, 1894, pp. 9, 147–211 (online version) and is considered a pre-congregational saint in the Catholic church.CatholicSaints.info -Saint Eoaldus
Eoaldus is mentioned in the will of the abbot Ephibius in 696, which left lands to the church in Vienne, and in a confirmation of Childebert III in 697.Ulysse Chevalier, Notice chronologico-historique sur les archevêques de Vienne: d'après des documents paléographiques inédits, Vienne, 1879, p. 9 (online version)
He was a relation of the Frankish royal family. He was responsible for beginning the construction of a new cathedral in Vienne (replaced in the 11th century) and for its dedication to Saint Maurice and the Theban Legion.Jean-Baptiste Drouet de Maupertuy, L'Histoire de la sainte Eglise de Vienne, Lyon, Jean Certe, 1708, pp. 88–89 (online version)
His feast day is celebrated on 7 July.
References
Further reading "Ecclesia Viennensis" in Jean-Barthélemy Hauréau, Gallia christiana, vol. XVI, Paris, 1865, col. 35 (online version)