Alexander Arthur Alfonso David Maule Ramsay was born at Clarence House, then the London residence of his maternal grandfather, the Duke of Connaught. He (along with his cousin Viscount Lascelles, later 7th Earl of Harewood) acted as a page of honour during the coronation of King George VI. After leaving Eton College the same year, he received commission in the Grenadier Guards. Ramsay saw active service in North Africa during World War II. He lost the lower part of his right leg during a tank battle at Tunisia in 1943. In 1944, he joined the staff of his cousin, HRH the Duke of Gloucester, who was then governor general of Australia.
Upon returning to Great Britain in 1947, he was informed that he would inherit Mar Lodge and its estates from his aunt, Princess Arthur of Connaught. In preparation for this role, he read agriculture at Trinity College, Cambridge. After graduating in 1952, he worked for three years as assistant factor on the Linlithgow estates at South Queensferry. Ramsay inherited the Mar estate in 1959. At that point, Lord Lyon King of Arms allowed him to add the designation "of Mar" to his name. Eventually the financial difficulties of running the 73,000 acre Mar estates forced him to sell it to the National Trust of Scotland in 1987.
In 1956, Ramsay married Flora Fraser (18 October 1920-), the only daughter of Alexander Fraser, 19th Lord Saltoun and chief of the Name of Fraser. His wife succeeded her father as the 20th Lady Saltoun and chief of the Name of Fraser in her own right in 1959. Thereafter, they resided at wife's family seat, Cairnbulg Castle at Fraserburgh, in Aberdeenshire. In 1971, he became the deputy lord lieutentant for Aberdeenshire.
Captain Alexander Ramsay of Mar and Lady Saltoun had three daughters:
1 Katherine is heir apparent to her mother's peerage and the headship of Fraser clan. Lord Lyon King Arms officially recognized her use of the surname Fraser in 1973.