List of 15 ancestors found in 40 iterations (15 distinct persons and 15 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Isabeau de Ponthieu (0971-1029)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Hildouin III de Ponthieu de Montdidier (0928-1009)
3Hersende de Ramerupt (~0925-0988)
Generation 2 - 4 person(s) on 4 (4 distinct persons)
4Guillaume de Ponthieu (~0915-0980)
5Alliette de Normandie (~0908-0932)
6Helpuin d'Arcis sur Aube (~0900-)
7Hersinde ? (~0897-)
Generation 3 - 2 person(s) on 8 (2 distinct persons)
8Herluin II de Ponthieu (~0890-13/08/0945)
9Hérissende d'Arcis de Dammartin (0874-)
Generation 4 - 2 person(s) on 16 (2 distinct persons)
16Helgaud III de Ponthieu (0860-0926)
17Hersende de Ramerupt (~0870-~0970)
Generation 5 - 2 person(s) on 32 (2 distinct persons)
32Herluin de Ponthieu (~0830-0878)
33Hélissende de Ramerupt (~0835-)
Generation 6 - 2 person(s) on 64 (2 distinct persons)
64Helgaud de Ponthieu (~0805-0863)
65Berthe de Ponthieu (~0805-0863)