Charles’s middle name should not be taken to indicate a relationship to any other Pettit with the same pair of given names. It would represent being named after either the fictional character Sir Charles Grandison or his namesake, the influential revivalist preacher Charles Grandison Finney (1792-1875).

See these articles:

http://en.wikipedia.org/wiki/Charles_Grandison_Finney

http://en.wikipedia.org/wiki/The_History_of_Sir_Charles_Grandison

Scott Co. Ky birth records list Nancy J. Morgan, born 7 Sep 1857, father Wm Morgan, mother’s maiden name Gardener.

1930 census of Grant Co., Indiana, Mill township, Gas City ward 3, enumerated 12 Apr, lists on p. 12B as household #317/322, at 106 West North D Street:
Pettit, Nancy J., 73, widowed, age at first marriage 17, b. Ky Ky Ky.

The preceding household is Nancy and John’s son Clinton.

1900 census of Scott Co., Ky, district 4, enumerated 20 June, lists on p. 14A as family #272/280:
Pettit, Charles, 61, b. Sep 1838, farmer; Nannie, wife, 43, b. Sep 1856, married 18 years, mother of 12 children, 9 living; William, son, 18, b. July 1881; Samuel, son, 17, b. Nov 1882; Mary, dau, 16, b. Mar 1883; Lizzie, dau, 14, b. Jan 1886; Clinton, son, 12, b. Mar 1888; Ada D., dau, 10, b. Feb 1890; Benjiman, son, 7, b. Aug 1892; Letha, dau, 4, b. May 1896. All born Ky Ky Ky.