List of 5 ancestors found in 40 iterations (5 distinct persons and 5 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Richard Ier d'Ailly (1029-1085)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Wallerand Ier d'Ailly (1003-1052)
3Mahaut de Gamaches (1011-1049)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
4Huon d'Ailly (0968-1022)
5Giselberthe d'Aumale (~0973-)