Ancient Diocese of Saint-Malo
The former Breton and French Catholic Diocese of Saint-Malo existed from at least the 7th century until the French Revolution. Its seat was at Aleth up to some point in the 12th century, when it moved to Saint-Malo. Its territory extended over some of the modern departments of Ille-et-Vilaine, Côtes-d'Armor, and Morbihan. Until the 860s, it was often termed the bishopric of Poutrocoet.Bishops of Aleth
- Aaron
- Suliac
- Saint Malo or Maclovius 487–565
- Gurval
- Colfin oder Colaphin
- Armael oder Armel
- Enogat
- Maëlmon, ca. 650
- Godefroi or Geofroi c. 656
- Oedmal
- Hamon I.
- Noedi
- Ritwal
- Tutamen
- Ravili
- Bili I.
- Meen or Moene
- Ebon or Edon
- Guibon or Guibert
- Hamon II.
- Walter
- Cadocanan
- Rivallon I.
- Judicaël I.
- Réginald or Regimond
- Menfenic
- Budic or Benedikt
- Docmaël or Idomaël
- Johannes
- Walter
- Hélogard or Haelocar 811–816
- Ermorus or Ermor 833–834
- Iarnwaltus or Jarnuvalt 835–837
- Main, Maen or Mahen 840–846
- Salocon c. 848
- Rethwalatrus or Retuvalart 857–867
- Ratvomo or Ratwili 867–872
- Bili II. ca. 880
- Salvator
- Rouaud oder Raoul um 990
- Vakanz 999–1028
- Hamon III. c. 1028
- Martin c. 1054
- Vakanz 1054–1062
- Renaud or Rainaud c. 1062
- Vakanz 1062–1085
- Daniel I. c. 1085
- Benedict
- Judicaël II. 1089–1111
- Rivallon II. 1112–1118
- Daniel II. c. 1120
- Donoald 1120–1143
Bishops of Saint-Malo
1146–1400
