Anna Cartlidge says they lived in Amherst until about 1796 when they moved to Lynchburg, Campbell Co., Va. His will is recorded in Amherst Co., Book 6, p. 13, Sept. 21 1818. The name is usually "Wiatt."
Alex Luken sent this note in June 2006:
"Wiatt Powell, married Sarah Floyd. Floyd-Powell: Wyatt Powell was the son of Richard Powell, Sr., whose will is in Amherst County Will Book 1, page 257. In this will, dated January 25, 1766, proved August 4, 1774, he leaves his son, Wyatt, 400 acres on Thresher's Creek in Amherst County. This land Richard had patented in 1730 (State Land Office Book 30, page 34). Besides Wyatt, Richard had Edmund, named first in the will; Thomas; John, who predeceased his father; Richard; Winifred; Rhoda, under 14 at the making of her father's will; and Clara (1739 - February 22, 1825), who married Capt. David Woodroof. The first name of Richard's wife was Elizabeth."
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=stevensp&id=I00143
