 Sir John Haldane, third of Gleneagles was Lord Justice General of Scotland beyond the Forth, sheriff principal of Edinburgh and Master of the Household under James III of Scotland.In 1482 he resigned his lands in Fife, Stirlingshire and Perthshire to the Crown, and as a result received a charter that erected them into the free barony of Gleneagles.He was married to a daughter of Murdoch Menteith of Rusky, through whom he claimed the earldom of Lennox.