List of 13 ancestors found in 40 iterations (13 distinct persons and 13 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
Generation 3 - 4 person(s) on 8 (4 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
16Josselin II de Beaumont-Gatinais (~1100-~1145)
17? de Bignon (~1105-)
20Baudouin V de Corbeil (~1100-)
21Aveline d'Etampes (~1104-)