1850 Isaac W Hartman (age 37) and Elvira Hartman (age 26) lived in Jackson Twp, Clermont County, Ohio with children Sarah Hartman (age 7) and Thomas J Hartman (age 4). Brother Joseph V Hartman (age 33) lived with them.  1854 On 1 September, Isaac W Hartman died at age 41y 6m 8d and was buried at Hartman Cemetery, Clermont County, Ohio. 
 US census, 1850
 Find A Grave Memorial 22108580, [Find_A_Grave].