| Sources |
- [S11805] Ancestry.com, 1870 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2009;), Year: 1870; Census Place: Township 3 Range 8, Madison, Illinois; Roll: M593_251; Page: 204B.
- [S8915] Ancestry.com and The Church of Jesus Christ of Latter-day Saints, 1880 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Lehi, UT ; Date: 2010;), Year: 1880; Census Place: Collinsville, Madison, Illinois; Roll: 233; Page: 412B; Enumeration District: 028.
- [S10838] Find a Grave: SCHROEPPEL Katherine Hoecker 1860-1929, Katherine Fredericka Schroeppel Hoecker.
daughter of John Adam Schroeppel and Caroline Louisa Finke
married Charles Hoecker 22 Aug 1880
https://www.findagrave.com/memorial/84335465/katherine_fredericka_hoecker
- [S141] Ancestry.com, Illinois, Deaths and Stillbirths Index, 1916-1947, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT ; Date: 2011;).
- [S241] Ancestry.com, Illinois, County Marriage Records, 1800-1940, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT ; Date: 2016;).
- [S1473] Ancestry.com, Illinois, U.S., Marriage Index, 1860-1920, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT ; Date: 2015;).
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