Judicael alias Berengar was Count of Rennes

Count of Rennes

The Count of Rennes was originally the ruler of the Romano-Frankish civitas of Rennes. From the middle of the ninth century these counts were Bretons with close ties to the Duchy of Brittany, which they often vied to rule. From 990 the Counts of Rennes were usually Dukes of Brittany...

 in the mid-to-late 10th century. There are conflicting accounts of his parentage, one popular solution making him son and successor to a count Berenger (sometimes identified with Berengar of Rennes, sometimes with that man's supposed maternal grandson of the same name) by a daughter of Gurvand, Duke of Brittany

Gurvand, Duke of Brittany

Wrhwant, Gurwant, Gurwent or Gurvand was a claimant to the Duchy of Brittany from 874 until his death in opposition to Pascweten, Count of Vannes.Wrhwant was complicit in the conspiracy which assassinated Salomon in 874...

. However, an 11th century collection of Angevin genealogies shows him to be son of Pascweten, son of Alan I, King of Brittany.

He is first documented as count in 944. He witnessed charters of Alan II, Duke of Brittany

Alan II, Duke of Brittany

Alan II , nicknamed Wrybeard and also known as Le Renard "The Fox", was Count of Vannes, Poher, and Nantes, and Duke of Brittany from 938 to his death...

, and on the latter's death apparently fell under the control of Wicohen, Archbishop of Dol, later sources reporting the rescue of Judicael and his (unnamed) wife by son Conan

Conan I of Rennes

Conan I was the count of Rennes from 958 and duke of Brittany from 990 to his death. He became ruler of Brittany after a period of civil and political unrest, having first succeeded his father Judicael Berengar, as count of Rennes....

. He appears to have been dead by 979, when his son was at the court of Odo I, Count of Blois

Odo I, Count of Blois

Odo I , Count of Blois, Chartres, Reims, Provins, Châteaudun, and Omois, was the son of Theobald I of Blois and Luitgard, daughter of Herbert II of Vermandois...

.