List of 7 ancestors found in 40 iterations (7 distinct persons and 7 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Roger II de Gand (~1145-1198)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Roger II de Courtrai (1120-1190)
3Sarah de Lille (1125-1162)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
6Roger II de Lille (1076-~1130)
7? de Phalempin (~1097-)
Generation 3 - 2 person(s) on 8 (2 distinct persons)
12Roger Ier de Lille (~1050-23/06/1098)
13Ogive de Flandres (~1055-)