This sounds like the right ones if they are black, but don't find a daughter named Lulu.
1880 census, Lowndes Co., GA, Oak Creek: Nathan Pierson, age 26, b. GA, parents b. GA, laborer Amanda, age 19, b. GA, parents b. GA Bobby, age 3, b. GA Annie S., age 1, b. GA Minnie Ola, age 1 mo., b. GA
1900 census, Berrien Co., GA, Rays Mill: Nathan Pearson, age 46, b. Aug 1854 GA, farm laborer Mandy, age 38, b. May 1862 GA Lizzy, age 16, b. Mar 1884 GA Charlie, age 14, b. Jan 1886 GA Georgia, age 12, b. Apr 1888 GA Viola, age 5, b. Aug 1894 GA Edith, age 4, b. Sep 1895 GA Samie (son), age 2, b. Oct 1897 GA Robert (son), age 23, b. Mar 1877 GA Mary, age 2, b. Apr 1900 GA
There is a gap in children between Georgia and Viola - one or possibly two children may have been born and died.