The webpage at https://macon.illinoisgenweb.org/greenwood/d/dunhammarietta.html says her great-great grandfather, Nathaniel Hewes (Hughes) fought in the Revolution - that is on her mother's side.
Marilla married Dayton Francis Dunham, son of Henry Dunham and Sarah Ellison, 9 Jul 1837 in Decatur, Macon Co., IL. (Dayton Francis Dunham was born 12 Nov 1814 in Woodbridge, Middlesex Co., New Jersey 850 and died 5 Sep 1894 in Decatur, Macon Co., IL 1194.)
A number of children including the first two who carry family names: Henry Dayton Dunham and Sarah Elizabeth Dunham. One son, Amos, died in the Civil War at Fort Donaldson.