Nielsen Hayden genealogy
Ancestors of Guigues IV of Vion
Abt 950 - Bef 996 (~ 45 years)
┌── Rostaing I 
(Abt 800 - ??)
(Abt 800 - ??) ┌── Rostaing II d'Annonay (Abt 830 - Bef 889)
(Abt 830 - Bef 889) │ └── Sufficia
│
┌── Guigues I d'Annonay (Abt 860 - ??)
(Abt 860 - ??) │ └── Berthilda ( - Aft 889)
( - Aft 889) │
┌── Guigues II of Vion (Between 885 and 895 - Bef 957)(m. 934)
(Between 885 and 895 - Bef 957)(m. 934) │ └── Wandelmode (m. 934)
(m. 934) │
Guigues IV of Vion (Abt 950 - Bef 996)