He married Elizabeth "Betsey" Hannah on 21 Dec 1798 in Strasburg, VA and they had 3 children.
He and his brother Henry W. Cooper are listed in Pioneers of Fairfield Co. Ohio as being saddle makers there in 1806.
Children:
George Cooper b. 1801 Strasburg VA
Rebecca Ann b. 5 Aug 1802 Strasburg VA (my line)
m. 10 Sep 1821 to Adam Brandt (17 children)
d. 18 Apr 1870 Fairfield Co. Ohio
William Cornelius Cooper b. 12 Jan 1804 Strasburg, VA
m. Missoura Newkirk on 12 Oct 1826 in Fairfield Co. Ohio (2 children )
d. after 1860 in Fairfield Co. Ohio
His brother Henry handled his estate when John died.