List of 13 ancestors found in 30 iterations (13 distinct persons and 13 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Robert IV le Gros de Béthune (1075-1128)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Robert III de Béthune (~1060-)
3Giselberthe d'Halluin (~1044-1097)
Generation 2 - 4 person(s) on 4 (4 distinct persons)
4Robert II de Bethune (1010-1071)
5Berthilde d'Ollehain (1019-1073)
6Rollon d'Halluin (~1009-1062)
7Adèle de Bailleul (~1018-1067)
Generation 3 - 4 person(s) on 8 (4 distinct persons)
10Wauthier III d'Ollehain (~0987-1039)
11Gisèle de Hainaut (~0998-1049)
14Huon de Bailleul (0992-1043)
15Jehanne de Wormhout (1002-1061)
Generation 4 - 2 person(s) on 16 (2 distinct persons)
20Wauthier II d'Olhain (~0953-1013)
21Blanche d'Hersin (~0964-1003)