High Quality Content by WIKIPEDIA articles! Henry Warington Smyth Baden-Powell KC (3 February 1847 – 24 April 1921), known as Warington within the family, was Robert Baden-Powell`s oldest brother. He was also the brother of Agnes Baden-Powell, George Baden-Powell, and Baden Baden-Powell, the son of Baden Powell, 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.