| Sources |
- [S9714] New York, New York, U.S., Death Index, 1949-1965.
- [S9322] 1920 United States Federal Census, Year: 1920; Census Place: Brooklyn Assembly District 15, Kings, New York; Roll: T625_1168; Page: 11A; Enumeration District: 920.
- [S9318] 1930 United States Federal Census, Year: 1930; Census Place: Brooklyn, Kings, New York; Page: 4B; Enumeration District: 0228; FHL microfilm: 2341254.
- [S587] New York, U.S., State and Federal Naturalization Records, 1794-1943, National Archives and Records Administration; Washington, DC; NAI Title: Index to Petitions for Naturalizations Filed in Federal, State, and Local Courts in New York City, 1792-1906; NAI Number: 5700802; Record Group Title: Records of District Courts of t.
National Archives and Records Administration; Washington, DC; NAI Title: Index to Petitions for Naturalizations Filed in Federal, State, and Local Courts in New York City, 1792-1906; NAI Number: 5700802; Record Group Title: Records of District Courts of t
- [S9348] Hamburg Passenger Lists, 1850-1934, Staatsarchiv Hamburg; Hamburg, Deutschland; Hamburger Passagierlisten; Volume: 373-7 I, VIII A 1 Band 255; Page: 410; Microfilm No.: K_1827.
- [S16] New York, U.S., Passenger and Crew Lists (including Castle Garden and Ellis Island), 1820-1957, Year: 1913; Arrival: New York, New York, USA; Microfilm Serial: T715, 1897-1957; Line: 30; Page Number: 117.
- [S1232] U.S., Naturalization Records Indexes, 1794-1995, National Archives and Records Administration (NARA); Washington, D.C.; Index to Naturalization Petitions of the United States District Court for the Eastern District of New York, 1865-1957; Microfilm Serial: M1164; Microfilm Roll: 104.
- [S226] Majdan Królewski Parish Records, 1895-1899 (Majdan Królewski), Majdan year 1896, act 17; Karolina Wydro birth and baptism.
- [S16] New York, U.S., Passenger and Crew Lists (including Castle Garden and Ellis Island), 1820-1957, Year: 1913; Arrival: New York, New York; Microfilm Serial: T715, 1897-1957; Microfilm Roll: Roll 2025; Line: 30; Page Number: 117.
- [S9282] 1940 United States Federal Census, Year: 1940; Census Place: New York, Kings, New York; Roll: m-t0627-02587; Page: 1A; Enumeration District: 24-1623.
- [S226] Majdan Królewski Parish Records, 1895-1899 (Majdan Królewski), Majdan year 1895, act 9; Franciszek Wydro and Emilia Rojek marriage.
- [S9647] New York, New York, U.S., Extracted Marriage Index, 1866-1937.
- [S9292] New York, New York, U.S., Marriage License Indexes, 1907-2018, New York City Municipal Archives; New York, New York; Borough: Brooklyn.
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