1850 Christopher D Hartman (age 30) and Elizabeth Hartman (age 26) lived in Jackson Twp, Clermont County, Ohio with children James Hartman (age 4) and George W Hartman (age 1). 
1860 Christopher D Hartman (age 40) and Elizabeth Hartman (age 36) lived in Jackson Twp, Clermont County, Ohio with children James W Hartman (age 14), George W Hartman (age 11), Joseph B Hartman (age 9), Samuel C Hartman (age 5), Rebecca J Hartman (age 3), and Nancy N Hartman (age 2). 
1866 The will of Christopher D Hartman was dated 4 January in Clermont County, Ohio with probate date 28 January 1866. Wife, Elizabeth Hartman was named executor. Albert G. Hartman and B. F. Hutchinson were sureties. 
1866 On 23 January, Christopher D Hartman died, at age 46y 2m 29d, and was buried at Hartman Cemetery, Clermont County, Ohio. 
 US census, 1850
 US census, 1860
 Ohio Probate Records, 1789-1996, Clermont, Will J-103, [FamilySearch_Image], [FHL film catalog].
 Beech Forest Chapter, DAR, Monument Inscriptions prior to 1900 from Cemeteries in Clermont County Ohio, Vol. 4 (1952), 1.
 Find A Grave Memorial 22108185, [Find_A_Grave].