I did a little research in the census records and think I have your Ault line.
1900 Marion Co. OH , Claridon twp., Caledonia Village, ED 53 Sheet 5B
133-134 George Ault b. Feb 1837 age 62, m. 23 yrs, b. OH fa. b. PA, mo. b. OH, Prop. Saw Mill
Ariminta A. wife b. Feb? 1866 age 49, m. 23 yrs, 4 children 3 living, b. OH, OH, OH
Howard L. b. Sept 1880 age 19
Florence M. daughter b. July 1888 age 11
Eva D. daughter b. Apr. 1893 age 7
Washington D. Ault father-in-law b. Jan 1827, age 72, widowed, b. OH, Germany, PA
1880 Marion Co. OH, Caledonia , pg 148C
78-80 George W. Ault age 42, b. OH, OH, PA Running saw mill
Arminta A. Wife age 23, b. OH, OH, OH
George W. Jr. Ault boarder age 29, b. OH, OH, OH
Martha Ault boarder age 24, b. OH, PA, Ire
Washington Ault father-in-law age 52, b. OH, PA, PA
Charles White bound, age 10
George apparently married Ariminta Ault as Washington is listed as a father-in-law. Washington was the son John & Eva (Ault) Ault of Belmont Co. OH. John & Eva were first cousins, John being the son of Henry & Anna Maria Alt, and Eva being the daughter of Frederick Alt & Eva Hein. Henry & Frederick were sons of Valentin Alt of York Co. PA. I don't know George's ancestry, but possibly he goes back to Valentine too. If you will search Ancestry's Family Trees you will find more information on Valentin's descendants.