Son of John MacDougall of Argyll (d. 1316) and grandson of Alexander MacDougall of Argyll (d. 1310). He and his brother Alan were in the household of Edward II.
W. D. H. Sellar, ‘MacDougall, John, lord of Argyll (d. 1316)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [http://www.oxforddnb.com/view/article/54284, accessed 23 July 2012]