Original sentence: Conflicting information has been given for the family's origin, one version making Conan great-grandson of Erispoe, Duke of Brittany.He became ruler of Brittany after a period of civil and political unrest, having first succeeded his father Judicael Berengar, as count of Rennes
Edited sentence: He became ruler of Brittany after a period of civil and political unrest, through his father, Judicael Berengar, count of Rennes and great-grandson of a duke of Brittany.Judicael was son of Berengar of Bayeux, himself the son of Herbert I, Count of Vermandois.Stoyan does not give this lineage, but Stirnet does