Bivin of Gorze explained

Bivin of Gorze (810/830 – 863) was a Frankish founder of the Bivinids family. He was married to a daughter of Boso the Elder, who may have been called Richildis. During his life he functioned as lay abbot of the Gorze Abbey. His offspring includes:

• Richilde of Provence, who married King Charles the Bald
• Richard the Justiciar, Duke of Burgundy, father of a king of France
• Boso, King of Provence
• possibly Bivin, Count of Metz.

Sources

• The Bosonids or Rising to Power in the Late Carolingian Age . Constance B. . Bouchard . French Historical Studies . 15, No. 3 (Spring) . 1988 . Duke University Press . 407–431 . 10.2307/286367 . 286367 .
• Book: Riché, Pierre . The Carolingians: The Family who Forged Europe . Michael Idomir . Allen . University of Pennsylvania Press . 1983 .