Alan III, Duke of Brittany

Alan III
Duke of Brittany
Reign20 November 1008 – 1 October 1040
PredecessorGeoffrey I
SuccessorConan II
RegentHawise of Normandy (Regent 1008–1026)
Bornc. 997
Died1 October 1040
Vimoutiers
SpouseBertha of Blois
IssueConan II, Duke of Brittany
Hawise, Duchess of Brittany
HouseRennes
FatherGeoffrey I, Duke of Brittany
MotherHawise of Normandy

Alan III of Rennes (c. 997 – 1 October 1040) (French: Alain III de Bretagne) was Count of Rennes and duke of Brittany, by right of succession from 1008 to his death.