There was a William Riley Yearwood born in SC. Wife unknown. I found 2 children for him; Mary Jane born 1853 in GA and Samuel Barton born 11/19/1854 in Wayne Co., MO. Also found a William Yearwood born 1800 in Lincoln Co., NC, died 1867 in Jefferson Co., IL. He had a son Samuel Rankin Yearwood born 7/13/1824 in Rutherford Co., NC; died 2/25/1911 in Evansville, IN. Samuel Rankin Yearwood was killed by a train. I have his children, etc. In fact I have a file in 3 parts that covers 7 generations of Yearwoods. I have a William R. Yearwood covered thru 11 generations, but I'm not sure that is the one you are looking for. He was my g-grandfather and there was no son named Samuel. My William R. Yearwood was born 1851 in Jefferson Co., IL, son of Robert A. Yearwood who was the son of Frederick Yearwood. If any of this sounds like what you are looking for let me know. I will be glad to share my files. Would love to see what you have, too.
Mary Ellen Capps