List of 15 ancestors found in 30 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)
4Michel de Visscher (09/07/1915-18/01/1981)
5Jacqueline Velge (31/01/1922-25/11/2015)
6Albert Schweitzer (~1926-)
7Marie-Madeleine Laurend (~1928-14/10/2006)
Generation 3 - 4 person(s) on 8 (4 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)