This census is the only evidence that links the Leotterle/Richner families at least that I've been able to find.
1880 Census: Laenna Twp., Logan Co., IL - page
Richner, Christina 48 Keeping House, [born Feb 1831] Wrbg - Wrbg - Wrbg, Widow
Leotterle, Frederick 28 Farmer [born Nov 1853] Wrbg - Wrbg - Wrbg
" Adam 22 Farmer [born 12 Aug 1860] IL - Wrbg - Wrbg
" Michael 20 Farm hand [born 26 Feb 1859] The rest are the same
Richner Mattie 14 at home
" Henry 12 at home
" William 10 at school
" Charles 18 Farm Hand
All are listed as son or daughter but Charles is Christina's stepchild.

Marriage record under name: Richurs, Charles F. & Stoll, Agnes E. Logan, 12/19/1889 Vol 2/ 7887

NARA: Delhi Jersey Co., was listed as having a Post Office in 1859

1900 US Census, Laenna, , Logan Co., IL (FHL #1240320)
Note that Elisabeth is listed as Lizzie.
93 95 Richner, Charles, Jun 1863, m: 10yrs, IL, Ger, Ger , Rents his farm
Lizzie Nov 1865, m: 10yrs, given birth to 5 children & 5 are living, IL, Ger, IL
Mary, Nov 1890, IL, IL, IL
Leonnie, Oct 1892, IL, IL, IL
William, Dec 1894, IL, IL, IL
Emma, Jun 1896, IL, IL, IL
Rena, Jul 1899, IL, IL, IL
He has 2 farm laborers helping out.

US Census of 1920 ED 73, Sht 10, line 13
Richner, Charles F., 57, Rents, IL, Switz/German, Switz/German, Farmer, Employer
Louanna, 50, IL
Son Wilhelm and his wife, Pearl, are living "next door". and doing farm labor., Wage worker

Information gleaned from his Death Certificate:
Informant was: I. E. or J. E. Holmes - P.O. Address: Chestnut, Illinois
Undertaker: Wilbert H. Schahl, Schahl Funeral Home, Mount Pulaski, Illinios
Charles had become ill 3 months prior to his death and had been living in the Township of Aetna for 3 years at the time of his death.
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Cemetery Transcriptions from Mt. Pulaski Cemetery:
These 2 and + little daughter Rena are buried together.

Carl F. Richner.
1863 - 1941

Agnes Elizabeth Richner.
wife of C.F. Richner
1863 - 1941
Nov. 8 1865
Feb. 19, 1901