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)
1Robert de la Fosse (~1110-)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Guillaume de la Fosse (~1080-)
3Yde de Mottenghien (~1082-)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
4Crépon de la Fosse (~1050-)
5? de Bevere (~1052-)
Generation 3 - 2 person(s) on 8 (2 distinct persons)
8Lancelin de la Fosse (~1020-)
9Judith de Wieupont (~1022-)