Not a family member but have you considered the following:
In the 1880 census there is a JOHN CHAPEL Age 70 - Divorced #118
At residence #50 CHAPPEL, NANCY Age 52
MORGAN, AMELIA Dau Age 33
MORGAN, JOHN N Age26 (This is same JOHN N. MORGAN listed with Nancy and John in 1870
CHAPEL, WILLIAM Son Age 14 (In all probability this is your JAMES Could it be JAMES WLLIAM?
CHAPEL,ROLAND B. Son Age 11 (could this be ROLAND BOATTAN?)
Marriage of JOHN CHAPEL to NANCY YOUNG on 24 July 1837 in Caldwell Co KY?