Baden Fletcher Smyth Baden-Powell, FS, FRAS, FRMetS (22 May 1860 – 3 October 1937) was the youngest son of Baden Powell, and the brother of Robert Baden-Powell, Warington Baden-Powell, George Baden-Powell, and Agnes Baden-Powell. He was also the uncle of Peter Baden-Powell, 2nd Baron Baden-Powell and Betty Clay, and the great-uncle of Robert Baden-Powell, 3rd Baron Baden-Powell and Michael Baden-Powell. He contributed to the Encyclopædia Britannica Eleventh Edition entry on 'kite-flying'.