Have information - The family claims descent from Caradog, a Prince of early Brittons and is reputed to have been a Knight of King Arthur's Round Table, the Castle Madoc in County Becknock was erected in 1588.
List of Powell names - William (4 of them), Walter, Henry, Reuben, Ralph Morrow, Elkanah (ggrandfather). These Powells are from VA, MD, WV. Some are reported to have been in Jamestown. Henry Powell married Sarah Strother who descends from King Charlamagne.
If any of this sounds familiar, would love to hear from you!