Emaline is a unique name among the Achesons.I have only one listed. She is my ggg aunt, and the daughter of James Acheson (b. 1805 in PA) and Nancy Acheson (b. 1809 in PA).James and Nancy were second cousins.I have no marriage information for Emaline (b. 1836 in Muskingum Co., OH).
Hunter Acheson's full name is John Hunter Acheson (b. 10/23/1825 in Muskingum Co., OH), the son of Humphrey Acheson and Elizabeth (Betsey) Hunter.John Hunter Acheson had a daughter named Emma L. Acheson (b. March 1882 in Winterset, Madison Co., IA).
All of the older people above lived in (and had family connections to) Louisa, Washington, Monroe, Madison, and Muscatine Counties, Iowa. Among the extended families in Southern Iowa, several migrated to Kansas.I suggest checking the marriage indexes there.
Also, Humphrey and James Acheson were brothers in a group of ten siblings, most of whom emigrated from Ohio to Iowa.