The Birth Date is a rough estimate. See the text for details.
Michael was born about 1800. His birth date was estimated based on the baptismal records of his children.
Sources
Listed as father: Kościół rzymsko-katolicki. Parafja Szwarcenowo (Nowe Miasto Lubawskie) (Szwarcenowo, Nowe Miasto Lubawskie, Olsztyn, Poland), Baptisms 1833, Item 42 (Image 88 of 686), Friedericus Zalewski; 11 Aug 1833; digital image, FamilySearch (https://www.familysearch.org/search/catalog/289877 : accessed 2 August 2019)
Listed as father: Kościół rzymsko-katolicki. Parafja Szwarcenowo (Nowe Miasto Lubawskie) (Szwarcenowo, Nowe Miasto Lubawskie, Olsztyn, Poland), Baptisms 1837, Item 126 (Image 152 of 686), Michael Zalewski; 3 Dec 1837; digital image, FamilySearch (https://www.familysearch.org/search/catalog/289877 : accessed 2 August 2019)
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