Constantine of Dunbar is confirmed as son of Waltheof of Dunbar and Alina but ODNB. Andrew McDonald, ‘Waltheof, third earl of Lothian (d. 1182)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [http://www.oxforddnb.com/view/article/50325, accessed 27 Sept 2017]. Needs to have his name changed from Unknown Constantine to Constantine Dunbar and source added.