I'm not related but I looked up these census records for you.
1900 Moultrie Co. IL Dora twp., ED 97 pg 122A Image 7 56/56 Robert L. Ault b. Oct 1864 age 35, married 12 yrs, b. IN, father OH, mother OH, Grocer Salesman Ada wife, b. Dec 1866 age 33, married 12 yrs, 3 children born - 3 living, b. OH, father NY, mother OH Arthur R. son b. July 1888 age 11, b. IL IL OH Buella M. daughter b. July 1890 age 9, b. IL IL OH Cecil M. daughter b. Mar 1894 age 6 b. IL IL OH
1910 Moultrie Co. IL Dora twp., Dist 136, pg 97B, Image 14 40/41 Robert L. Ault age 41, marriage 1, 22yrs, b. IN IN IN Retail Merchant Gen. Store Ada A. wife, age 42, marriage 1, 22 yrs, b. OH NY OH Operator telephone Arthur R. son , age 21, marriage 1, 0 yrs, b. IL IN OH Salesman Drugstore Maude E. daughter-in-law, age 19, marriage 1, 0 yrs., Beulah I. daughter, age 19 single, b. IL IN OH Cecile M. daughter, age 16 single, b. IL IN OH Eugean grandson, age 1/12 b. IL IL IL
I didn't look this up on the census, but it's in the book Valentin Alt His Children and his grandchildren by Nellie Reeser Ault pg 101
1870 Moultrie Co. IL, Dora Levi Ault age 28 Farmer b. OH Martha Ault age 24 b. OH Robert L. Ault age 5 b. IN Anna J. Ault age 4 b. IN Myrtie W. Ault age 1 b. IN George W. Ault age 78 lives with son b. PA Amy Ault age 60 lives with son b. OH Lewis Ault age 21 Farmer b. OH
Also from the book.
George was the son of Valentine Ault b. 1750 d. ca 1826, of Belmont Co. Ohio. Valentine was the son of the immigrant Valentin Alt of York Co.PAGeorge married # 1 Margaret (Polly) Ault, daughter of George's first cousin, Frederick , who was a son of George's uncle Frederick Ault. After the death of Polly George married Jan 14, 1836 Amy Batten.