You have done some great detective work.I have pulled the following information from a post at RootsWeb by a Sherri Richardson.She no longer has the e-mail address so I have just taken the information that she gathered and went with it.
Henry and Elisabeth had the following children:
Mary Ann b. 1829, TN - md. Harvey McFall in October 1850 Dorothea Clementine b. 1830, TN - md. Alfred Cool in 1849.(Clementine also die young - I think in child birth) Joseph F. b. 1832, IN - md. Anna Eliza Young (My gggf/gggm) Child? b. 1834...ELIZA JANE b. 1834, IN - md. Abner Beale Child? b. 1836-37 James M. b. 1839, IN - md. Samantha P. Hardin Elizabeth b. 1840, IN - md. Dean Miller Henry b. 1841, IN, - Indiana Prather Malinda Frances b. 1843, IN - md. John Heald William John b. 1846, IN - md. Naomi??? George b. 1847, IN - died 4/25/1864, St. Louis, MO
Other family in the Putnam Co. MO area is William Thomas Bohannon(found on the 1880 Census), this is Elisabeth Bohannon Grammar's youngest brother.
It would seem with the marriage of Abner and Eliza, the family had moved to Iowa by the 1850's...but I can't find them on the 1850 Indiana Census or the Iowa Census for that year.
Again, I appreciate you taking the time to write with the information.If I can help any with family research feel free to write.