researching William Gorge McMullen(b 1855/GA) ancestry

1870 census of Miller County GA
Claton McMullen, 42
Martha E, 32
Moning, 16
George W, 14
Mary Jane, 9
Rebecca, 5
Sarah l, 2

Did not find Clayton or Claton McMullen in 1880.

1880 census of Henry County GA(dated 14 Jun)
Wm McMullin, 23, b GA, parents b GA, farmer
wife, Mary J, 27, b GA, parents b GA
d, Minnie, 4, b GA
s, William W, 3, b GA
s, Andrew J, 1, b GA
next household, mother, Eliza McMullin, 43, b GA, parents b GA, widow

Wm McMullen shown age 23 in 1880, but 1900 Lincoln County LA census shows him born Sep 1855. Eliza no longer shown.

1860 census of Clayton County GA includes F McMullen, 27(male), L E, 23(female), W G McMullen, 5(male), M J, 2(female) and W A, 7 months(male), all b GA. This is a good match to 1870 based on age(based on census) of W G and Eliza, and another child M J. Possible that the Claton McMullen in 1870 could be kin of F McMullen, who may have died in Civil War.

Looking for any info on Clayton McMullen family.

Thanks