List of 3 ancestors found in 40 iterations (3 distinct persons and 3 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Baudouin II de Boulogne (0976-1032)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Guy Ier Barbe Blanche de Boulogne (~0953-0987)
3Adeline de Desvres (~0964-)