2021 Relativity
2021 Relativity
Franciszek GronczewskiPawel Piasecki(13 Jan 1850 - )
Julianna GoreckaMaryanna Olszewska(22 Sep 1857 - )
Stanislaw Gronczewski
Konstancya Piasecka
b. 1882
d.
b. 1886
d.
Children
Jozef Gronczewski(20 Apr 1908 - )