William de Abernethy, 2nd Baron of Saltoun
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Sir William de Abernethy, 2nd Baron of Saltoun was a 13th-14th century Scottish baron and noble.
William was the son of William Abernethy, 1st Baron of Saltoun.[1] He swore fealty to King Edward I of England at Birgham in 1290 and again at Berwick in 1296. He was a signatory of the Declaration of Arbroath in 1320.