Thomas Dempster (23 August 1579 – 6 September 1625) wis a Scots scholart an historian.
- But this date is disputit. Thomas said that he wis ane o 29 childer an belanged tae a set o treeplets, that seems an impossibility an for that thare is na ither evidence. A modren Dempster, James, raisons, on a wabsteid established bi him at  Archived 12 Februar 2012 at the Wayback Machine, that 9 is a plausible feegur. As it haes been established bi ither documentation that Thomas wis the third son, fowert bairn, an that his paurents war mairied in 1568, allouin an interval o 18 months James arrives at 1574 or 1575, that maks Thomas conseederably less precocious. Houiver, this airticle, follaein the soorces on that it is based, presumes a birth at 1579.