The Leroy Yowell you seek is most likely Leroy "Lee" Yowell (b. abt 1790 - Culpeper (now Madison) County, VA, d. 1879 - Bradfordsville, Marion County, KY) son of Moses Yowell and ?. "Moses, son of William Yowell, the Kentucky pioneer, is said to have entered Kentucky during the first years of settlement, with his four sons.That he was a son of William and a brother of William, Jr., and James Yowell, is indicated by the fact that the families settled in the same neighborhood and their children addressed each other as 'cousin'.James Yowell, fourth son of William, Jr., is said to have been raised in the home of John and Sallie (Coppage) Yowell, this John being a son of Moses.The four sons of Moses Yowell, of Washington County, Kentucky, according to data prepared by his grandson, Hardin Yowell, under date of May 5, 1917, and furnished by Florence Yowell, of Hustonville, December 11, 1924, were as follows:
1. James, who later migrated to Illinois. 2. Leroy (Lee), who lived and died near Bradfordsville, Marion County, Kentucky.His wife called Polly in a deed from his brother, John, dated August 8, 1832, and recorded in Washington County. 3. Moses, Jr. 4. John, who moved to Taylor County; he married Sallie Coppage...."
(Source: "Yowell, A Genealogical Collection" by Clark S. Yowell, 1931, p. 70)
3.Moses Yowell, Jr. married Phoebe Crownover and was in Bradford County in 1850. Moses,Jr. and Phoebe had: James, Hall, Martha Ann, Mary Ann, Hardin, and Moses.
I have a fairly complete database on these Yowell's and would be happy to share -- just e-mail me.