Sir William Nairne, Lord Dunsinane, 5th Baronet of Nairne (c. 1731-1811) was a Scottish advocate and judge, and the uncle of Katherine Ogilvie. The title of Lord Dunsinane was taken from Dunsinane Hill, a ruined fort near Collace, Perthshire, the family seat of the Nairne family. Dunsinane Hill is referenced in Shakespeare's play, Macbeth. The alternative Gaelic spelling of the term Dunsinane is Dunsinnan, meaning "The hill of ants"; probably a reference to the large number of people it took to build the fortress.