Abt 1800 - 
 | Teofil Kostewicz Abt 1867- |
| Teofil Kostewicz | |
| B: | Abt 1867 |
| Wola Smolana | |
 | Jadwiga Kostewicz (née Szczęsna) Abt 1872- |
| Jadwiga Kostewicz (née Szczęsna) | |
| B: | Abt 1872 |
| M: | 1890 |
| Wola Kiełpińska, par. św. Antoniego | |
| Andrzej Kostewicz Yes, date unknown- |
| Andrzej Kostewicz | |
| B: | Yes, date unknown |
| Antoni Filip Kostewicz 1902-1904 |
| Antoni Filip Kostewicz | |
| B: | 1 May 1902 |
| Nuna | |
| D: | 17 Aug 1904 |
| Nuna | |
| Czesław Chester Kostewicz 1904-1977 |
| Czesław Chester Kostewicz | |
| B: | 16 Jan 1904 |
| Nuna | |
| D: | Jan 1977 |
| Helena Kostewicz Yes, date unknown- |
| Helena Kostewicz | |
| B: | Yes, date unknown |
| Anna Kostewicz 1907-1919 |
| Anna Kostewicz | |
| B: | 1907 |
| Nuna | |
| D: | 10 Sep 1919 |
| Joseph Józef Kostewicz 1910-1993 |
| Joseph Józef Kostewicz | |
| B: | 02 Aug 1910 |
| East Vandergrift, PA | |
| D: | 06 Oct 1993 |
| Catherine Kostewicz (née Żak) 1913-1982 |
| Catherine Kostewicz (née Żak) | |
| B: | 1913 |
| Diamond, PA | |
| M: | 30 May 1938 |
| USA | |
| D: | 1982 |
| Helena Nowicki (née Kostewicz) 1912-1985 |
| Helena Nowicki (née Kostewicz) | |
| B: | 16 Feb 1912 |
| East Vandergrift, PA | |
| D: | 14 Jun 1985 |
| Natrona Heights, Allegheny, Pennsylvania | |
| Leonard A. Nowicki 1912-1978 |
| Leonard A. Nowicki | |
| B: | 11 Aug 1912 |
| M: | 15 May 1934 |
| D: | 20 Apr 1978 |
| Aleksander Alex Kostewicz 1918-1996 |
| Aleksander Alex Kostewicz | |
| B: | 20 May 1918 |
| D: | 08 Aug 1996 |
| Henrietta Kostewicz (née Żandarski) 1919-2015 |
| Henrietta Kostewicz (née Żandarski) | |
| B: | 16 Nov 1919 |
| M: | 1940 |
| D: | 19 Jan 2015 |
| USA | |
| Stefan Stephen Kostewicz 1921-2001 |
| Stefan Stephen Kostewicz | |
| B: | 29 Sep 1921 |
| D: | 28 Dec 2001 |
| Seabrook, Cumberland, New Jersey | |
| Helen Kostewicz Yes, date unknown- |
| Helen Kostewicz | |
| B: | Yes, date unknown |
| Władysław "Walter" Kostewicz 1874-1955 |
| Władysław "Walter" Kostewicz | |
| B: | 04 Nov 1874 |
| Wola Smolana | |
| D: | 12 May 1955 |
| Waleria Kostewicz (née Korycka) 1882-1955 |
| Waleria Kostewicz (née Korycka) | |
| B: | 08 Sep 1882 |
| Psucin, nowodworski | |
| M: | 07 Oct 1900 |
| Nasielsk, nowodworski, mazowieckie, Polska | |
| D: | 12 Dec 1955 |
| PA, USA | |
| Szymon Kostewicz 1876-Yes, date unknown |
| Szymon Kostewicz | |
| B: | 22 Oct 1876 |
| Wola Smolana | |
| D: | Yes, date unknown |
| Antoni Kostewicz 1879-Yes, date unknown |
| Antoni Kostewicz | |
| B: | 1 Jun 1879 |
| Wola Smolana | |
| D: | Yes, date unknown |
| Józefa Kostewicz 1881-1882 |
| Józefa Kostewicz | |
| B: | 16 Mar 1881 |
| Wola Smolana | |
| D: | 1882 |
| Wola Smolana | |
| Franciszek Kostewicz Yes, date unknown- |
| Franciszek Kostewicz | |
| B: | Yes, date unknown |
| Wola Smolana | |
| Antonina Kostewicz (née Sikorska) Yes, date unknown- |
| Antonina Kostewicz (née Sikorska) | |
| B: | Yes, date unknown |
| Zbroszki, mazowieckie | |
| M: | 1895 |
| Winnica | |
| Antoni Kostewicz Abt 1828-1881 |
| Antoni Kostewicz | |
| B: | Abt 1828 |
| Jaskółowo, mazowieckie | |
| D: | 7 May 1881 |
| Wola Smolana | |
| Julianna Kostewicz (née Jabłońska) Abt 1847-Yes, date unknown |
| Julianna Kostewicz (née Jabłońska) | |
| B: | Abt 1847 |
| D: | Yes, date unknown |
| Florentyna Byszczyńska (née Szajkowska) | |
| B: | 1874 |
| Stanisławowo, par. Zegrze | |
| Stanisław Buszczyński Yes, date unknown- |
| Stanisław Buszczyński | |
| B: | Yes, date unknown |
| M: | Yes, date unknown |
| Władysław Szajkowski 1879- |
| Władysław Szajkowski | |
| B: | 1879 |
| Józefa Pawlak (née Szajkowska) | |
| B: | 1881 |
| Stanisławów, par. Zegrze | |
| Jan Pawlak Yes, date unknown- |
| Jan Pawlak | |
| B: | Yes, date unknown |
| M: | 1900 |
| parafia Zegrze | |
| Józef Szajkowski 1884- |
| Józef Szajkowski | |
| B: | 1884 |
| Stanisławów, par. Zegrze | |
| Wiktoria Osińska (née Szajkowska) Abt 1875- |
| Wiktoria Osińska (née Szajkowska) | |
| B: | Abt 1875 |
| Józef Osiński Yes, date unknown- |
| Józef Osiński | |
| B: | Yes, date unknown |
| M: | 1894 |
| par. Zegrze | |
| Marcjanna Pisarzewska Abt 1871- |
| Marcjanna Pisarzewska | |
| B: | Abt 1871 |
| Jan Pisarzewski Yes, date unknown- |
| Jan Pisarzewski | |
| B: | Yes, date unknown |
| M: | 1900 |
| par. Zegrze | |
| Anna Chojnacka (née Szajkowska) Abt 1868- |
| Anna Chojnacka (née Szajkowska) | |
| B: | Abt 1868 |
| Stanisław Chojnacki Yes, date unknown- |
| Stanisław Chojnacki | |
| B: | Yes, date unknown |
| M: | 1886 |
| par. Zegrze | |
| Marianna Szajkowska (née Kostewicz) Abt 1842-1908 |
| Marianna Szajkowska (née Kostewicz) | |
| B: | Abt 1842 |
| D: | 1908 |
| Stanisławowo par Zegrze | |
| Teofil Szajkowski Yes, date unknown- |
| Teofil Szajkowski | |
| B: | Yes, date unknown |
| M: | 1865 |
| Nasielsk, nowodworski, mazowieckie, Polska | |
| Mateusz Kostewicz Abt 1800- |
| Mateusz Kostewicz | |
| B: | Abt 1800 |
| Joanna Kostewicz (née Ciszewska) Yes, date unknown-Yes, date unknown |
| Joanna Kostewicz (née Ciszewska) | |
| B: | Yes, date unknown |
| M: | Yes, date unknown |
| D: | Yes, date unknown |
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