List of 27 ancestors found in 40 iterations (25 distinct persons and 27 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)
Generation 5 - 4 person(s) on 32 (4 distinct persons)
Generation 6 - 6 person(s) on 64 (6 distinct persons)
64Guillaume Lefebvre (1310-1372)
65Jeanne de Bourgon (1320-)
66Jean Le Fébvre (~1300-1361)
67? De Grainlhéville (~1302-)
72Colas Le Berseur (~1380-)
73Marguerite de Chanteloup (~1380-)
Generation 7 - 6 person(s) on 128 (4 distinct persons)