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 - 2 person(s) on 8 (2 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
16Jan Meert (~1225-)
17Machthild Veele (1247-)
18Everwin III De Wisselere (~1235-)
19Elisabeth Vos (~1237-)
Generation 5 - 2 person(s) on 32 (2 distinct persons)