List of 12 ancestors found in 40 iterations (12 distinct persons and 12 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)
4? Werpin (~1797-)
5Anna Mansion (~1802-)
6Pierre de Marneffe (28/08/1767-05/02/1845)
7Marie-Catherine Séverin (20/11/1767-14/02/1844)
Generation 3 - 3 person(s) on 8 (3 distinct persons)
Generation 4 - 2 person(s) on 16 (2 distinct persons)