I don't have access to the 1930 census' out of Texas.I see you have made various posts at the Millsap/ Iowa/ Illinois boards and the name Charles might be verified there.He's only listed at Leo in the two census records I found.
1920 Hand Co., SD Gilbert Millsap Charles head m w 43 mrd IL IL IN farmer " Lillie wife f w 38 mrd IN " Oral son m w 19 mrd IL " Florence dau f w 17 sgl LA " Harley son m w 15 sgl LA " Leo son m w 14 sgl TX " Gerturde dau f w 9 sgl IL " Hazel dau-in-law f w 22 mrd IL IL IL (Oral's wife)
1910 Coles Co., IL North Okaw Twp Millsap Charles head m w 32 married at 18 yrs IL IL OH laborer day " Lilly wife f w 32 married at 18 yrs 4kids 4living IN OH OH " Oval son m w 10 sgl IL " Flarau? dau f w 8 sgl LA " Harley son m w 6 sgl LA " Leo son m w 3 sgl TX
1900 Moultrie Co., IL Lovington Twp Millsap Charles sep 1875 24 IL IL IL farm laborer Lillie May 1880 IN IN OH Orvel son Jul 1898 IL Oral son Mar 1899 IL
Charlies MILLSAP & Lillie A Williams Married: 26 SEP 1897 in Shelby Co., Illinois
1880 U.S.Census Place Bowdre, Douglas, Illinois Page 60A Name Relation Sex Race Age Marr Birthplaces[Name,Dad,Mom] Occupation John W. MILLSAP Self Male W 40 M [IN TN TN] Tanner Jane MILLSAP Wife Female W 30 M [IN IN IN] Keeping House John R. MILLSAP Son Male W 9 S [IL IL IL] Jamies F. MILLSAP Son Male W 5 S [IL IL IL] Charley MILLSAP Son Male W 1 S [IL IL IL] (This is the only Charles in the indexes - may not be him.)