Commentary
van de Pas and Charles Cawley make him the son of Berenger, Count of Bayeux (889-<931) and his wife, the daughter of Gurvand, Duke of Britanny who died in 877.

Peter Stewart in an posting to the GEN_MEDIEVAL mailing post dated June 26, 2010 stated:
"the 15th century Breton historian Pierre le Baud called Judicael Berenger "Iuhael le Comte de Rennes, fils de Berenger", in a narrative given by him in French ascribing it to "les chronicques annaux" (presumably miscellaneous monastic annals now lost, but whether contemporary and accurate in this instance, or even translated literally, cannot be said with any certainty)"

Stewart Baldwin says his father is unknown, but possibly Pascweten based on a contemporary source and shows why Berenger, Count of Bayeax is suspect.
Family
ClaimDetailEvidence
Child +Conan de Rennes, Duke of Brittany (e938-992) [S915]
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Attributes
ClaimDetailEvidence
GenderMale
NameJuhel , Count of Rennes [S1345]
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NameJuhael [S915]
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NameJudicael [S915]
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NameBerenger , Count of Rennes [S1345]
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TitleCount of Rennes [S915]
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Timeline
ClaimDateDetailAgeEvidence
Birthest 900 (890-910)
 
Living910 [S915]
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Deathabt 970 [S915]
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Sources
IndexTitle
[S915] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Brittany: Dukes)" (2006-7 (v1.3 Updated 21 July 2007)) (https://fmg.ac/Projects/MedLands/BRITTANY.htm).
[S1345] Baldwin, Stewart, "The Henry Project - Juhel Bérenger" (November 25, 2007) (https://fasg.org/projects/henryproject/data/juhel000.htm).