List of 15 ancestors found in 30 iterations (15 distinct persons and 15 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Wathier de Boubers (~1054-~1108)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Alexandre de Boubers (~1025-~1074)
3Mahaut de Bours (~1029-~1089)
Generation 2 - 4 person(s) on 4 (4 distinct persons)
4Huon de Boubers (~0997-~1049)
5Marie de Fresnoy (~1010-~1064)
6Jehan de Bours (0995-1047)
7Alix de Saint Pol (~1002-1054)
Generation 3 - 4 person(s) on 8 (4 distinct persons)
12Eustache de Bours (0970-1017)
13Richilde de Wignacourt (~0973-)
14Hughes III de Boulogne dit de Saint Pol (~0978-1028)
15Aldegonde de Saint Pol (~0978-1032)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
26Ithier de Wignacourt (0957-)
27Noelle de Dammartin (~0945-)
28Guy Ier Barbe Blanche de Boulogne (~0953-0987)
29Adeline de Desvres (~0964-)