Sir Walter Scott, 1st of Branxholme, 3rd of Buccleuch (c. 1495 – killed 4 October 1552), known as "Wicked Wat", was a nobleman of the Scottish Borders and the chief of Clan Scott who briefly served as Warden of the Middle March. He was an "inveterate English hater" active in the wars known as The Rough Wooing and a noted Border reiver. He was killed in the streets of Edinburgh in a feud with Clan Kerr in 1552. His great-grandson was Sir Walter Scott, 1st Lord Scott of Buccleuch, the "Bold Buccleuch" (1565–1611), a border reiver famed for his role in the rescue of Kinmont Willie Armstrong.