The link connectio as is works back to him being son of his dradaughter
Erispoë I "the Elder" de Broërec, Comte de Poher MP
Son of Budic de Poher, Roi du Bretagne and Marmoëc de Poher
https://www.geni.com/people/Marmoëc-de-Poher/6000000003827963746 MP
Birth: circa 810
Nantes, Loire-Atlantique, Pays de la Loire, France
Managed by: Patricia Ann Topping
Daughter of Riwallon III, count of Poher and N.N. Lahngau
Wife of Budic de Poher, Roi du Bretagne and Erispoë II, king of Brittany