Barnwell is an uncommon English name of Old English origin, derived from "beor" meaning barley and "welle" meaning spring or stream, signifying "stream where barley grows". It reflects rural life in medieval England and was likely adopted as a given name by inhabitants of the several villages named Barnwell across England. Notable bearers include Sir Ralph Barnwell, a knight who fought in the Hundred Years' War, and Reverend Thomas Barnwell, an 18th-century clergyman and historian. Despite its rarity, Barnwell may appeal to those seeking a unique, nature-inspired name with strong English historical ties.