List of 7 ancestors found in 40 iterations (7 distinct persons and 7 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)
4Jean d'Anhalt-Zerbst (~1330-1382)
5Elisabeth von Henneberg-Schleusingen (1351-1397)
6Gebhard von Querfurt (~1332-1383)
7Mechtild von Schwarzburg-Blankenburg (~1334-~1370)