List of 15 ancestors found in 40 iterations (15 distinct persons and 15 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 - 4 person(s) on 4 (4 distinct persons)
Generation 3 - 4 person(s) on 8 (4 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
16Emeric Joly (~1640-)
17Marie Collignon (~1650-22/01/1700)
18Mathieu Delforge n (~1655-)
19Françoise Thiry (~1657-)