List of 31 ancestors found in 40 iterations (31 distinct persons and 31 positions into tree)

Generation 0 - 1 person(s) on 1 (1 distinct persons)
1Ida de Thérouanne (~1248-~1306)
Generation 1 - 2 person(s) on 2 (2 distinct persons)
2Arnold IV de Thérouanne (~1207-~1249)
3Béatrix de Malannoy (1224-1268)
Generation 2 - 2 person(s) on 4 (2 distinct persons)
4Arnold III de Thérouanne (~1177-~1212)
5Elisabeth d'Ardres (~1170-~1248)
Generation 3 - 2 person(s) on 8 (2 distinct persons)
8Arnold II de Thérouanne (~1136-~1189)
9Adeline de Guînes (1155-1206)
Generation 4 - 2 person(s) on 16 (2 distinct persons)
16Alexandre de Thérouanne (1105-1169)
17Guislaine de Bours (1116-1159)
Generation 5 - 2 person(s) on 32 (2 distinct persons)
32Alexis de Thérouanne (1074-1135)
33Alix de Tingry (1088-1137)
Generation 6 - 2 person(s) on 64 (2 distinct persons)
64Gaucher III de Thérouanne (~1032-1089)
65Jehanne de Nédonchel (~1051-~1089)
Generation 7 - 2 person(s) on 128 (2 distinct persons)
128Godeffroi de Thérouanne (1005-1060)
129Walburge de Sainte Aldegonde (1015-1059)
Generation 8 - 2 person(s) on 256 (2 distinct persons)
258Huon II de Sainte Aldegonde (~0990-~1046)
259Angèle de Guines (~0997-~1054)
Generation 9 - 2 person(s) on 512 (2 distinct persons)
518Ardulf Ier le Posthume de Guînes (0966-)
519Mathilde de Boulogne (~0970-~1005)
Generation 10 - 2 person(s) on 1024 (2 distinct persons)
1036Siegfried Ier de Guines (~0905-0972)
1037Elftrude de Flandre (~0933-0972)
Generation 11 - 2 person(s) on 2048 (2 distinct persons)
2072Harald de Danemark (~0900-)
2073Gisèle de Lorraine (~0860-25/10/0907)
Generation 12 - 2 person(s) on 4096 (2 distinct persons)
4146Lothaire II de Germanie (~0835-12/08/0875)
4147Waldrade de Wormsgau (0815-08/04/0879)
Generation 13 - 2 person(s) on 8192 (2 distinct persons)
8292Lothaire Ier de Germanie (0795-29/09/0855)
8293Ermengarde de Tours (0804-20/05/0851)
Generation 14 - 2 person(s) on 16384 (2 distinct persons)
16584Louis Ier le Pieux de France (16/04/0778-20/06/0840)
16585Ermengarde de Hesbaye (0780-03/10/0818)
Generation 15 - 2 person(s) on 32768 (2 distinct persons)
33168Charlemagne de France (02/04/0747-28/01/0814)
33169Hildegarde von Vintzgau (~0757-26/04/0783)