List of 17 ancestors found in 40 iterations (17 distinct persons and 17 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
Generation 3 - 4 person(s) on 8 (4 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
28Eustache de Bours (0970-1017)
29Richilde de Wignacourt (~0973-)
30Hughes III de Boulogne dit de Saint Pol (~0978-1028)
31Aldegonde de Saint Pol (~0978-1032)
Generation 5 - 4 person(s) on 32 (4 distinct persons)