Judicael of Rennes (died in battle 888), was count of Rennes and duke of Brittany, from 877 to his death. He became ruler of Brittany after the death of his father Gurvand and his rival in Brittany, Pasquitan of Vannes. His accession was disputed with Alan of Vannes, brother of Pasquitan, who defeated him in battle in 888.
See also: Dukes of Brittany family tree
