List of 3 ancestors found in 40 iterations (3 distinct persons and 3 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Dreux de Mantes (~1000-1035)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Gauthier II Le Blanc de Valois (~0970-1017)
3Alix de Vermandois (~0956-~1012)