NIDDRY, a village, in the parish of Kirkliston, county of Linlithgow, 2 miles (W.) from the village of Kirkliston; containing 111 inhabitants. The head of the barony of Niddry was anciently hereditary bailie of the ecclesiastical regality of Kirkliston; and it is mentioned that during the reign of David II., Alexander Seton granted to Ade Forest two ploughs of land in the town of Niddry. The celebrated castle stands a little south of the Edinburgh and Linlithgow road. It was at one time possessed by the Earls of Wintoun; and Mary, Queen of Scots, rested, and, it is said, slept, at this castle when on her flight from Lochleven to join her adherents at Hamilton, in 1568. It is now the property of the Earl of Hopetoun, and is a fine old ruin. The Edinburgh and Glasgow railway, and the Union canal, pass by Niddry. The Earl of Hopetoun derives his title of Baron Niddry from this place.