List of 21 ancestors found in 40 iterations (21 distinct persons and 21 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)
Generation 3 - 8 person(s) on 8 (8 distinct persons)
Generation 4 - 4 person(s) on 16 (4 distinct persons)
Generation 5 - 2 person(s) on 32 (2 distinct persons)
34Oleg de Kiev (~0865-~0913)
35Helena de Novgorod (~0866-)