This might be a connection. From familysearch.org.
Reuben and a Margaret in the 1870 census have children Ann and Sam. In same location in 1880, Maggie Lenhart is listed as divorced, living with Ann and other dau as well as her brother John Sellars.
In 1880, same area, R.S. Lenhart is living with son Sam, a different wife and some daughters, however can't tell if those daughters are his or steps/children of wife E.S.?
The death cert of Sam Lenhart indicates his parents as Father Lenhart, Mother Cellars.
"U S Census, 1870 Hackberry, Labette, KS
Reuben Lenhart M 37y OH
Margaret Lenhart F 32y OH
Ann Lenhart F 5y IN
Samuel Lenhart M 2y KS
George Miller M 27y OH
U States Census, 1880 Hackberry, Labette, KS
self Magie Lenhart F 43 OH divorced
dau Annie L Lenhart F 15 IN
dau Helen A Lenhart F 7 KS
dau Maggie Lenhart F 1 KS
bro John Sellers M 36 IN
US Census, 1880 Oswego, Labette, KS
self R. S. Lenhart M 46 OH /VA/PA
wife E. S. Lenhart F 30 OH
son S. C. Lenhart M 12 KS
dau Cora M. Lenhart F 9 KS
dau Stella Lenhart F 8 OH
California, Death Index
name: Samuel Cellers Lenhart
Death 17 Aug 1951 Kern, CA
birth 14 Feb 1868 Kansas
father: Lenhart mother: Cellars
