Conan I le Tort of Rennes, Count of Rennes, Duke of Brittany, was born 927 to Judicael Berengar (-bef979) and died 27 June 992 at the Battle of Conquereuil of unspecified causes. He married Ermengarde of Anjou (bef967-) .

Conan may have married his second cousin once removed: Herbert I, Count of Vermandois (c848-907) may have been his great-grandfather and was his wife's great-great-grandfather.


Offspring of Conan I of Rennes and Ermengarde of Anjou (bef967-)
Name Birth Death Joined with
Geoffroi I de Bretagne (980-1008) 980 1008 Hawise of Normandy (c978-1034)

Judith of Brittany (982-1017) 982 1017 Richard II, Duke of Normandy (963-1027)

Offspring of Conan I of Rennes and unknown parent
Name Birth Death Joined with
Judicael of Rennes (aft980-1037) 980 13 June 1037
Catualon of Rennes (aft980-1040) 980 1040
Hernod of Rennes (?-?)
Urvod of Rennes (?-?)

Noteworthy descendants include

  1. William I of England (1027-1087)

Footnotes (including sources)