Henry Wardlaw
Henry Wardlaw( died 6 April 1440) was a Scottish church leader, Bishop of St Andrews and founder of the University of St Andrews.
Prince Edward, Duke of Kent
Prince Edward, Duke of Kent, (Edward George Nicholas Paul Patrick; born 9 October 1935) is a member of the British royal family.
He is a first cousin of Queen Elizabeth II through their fathers, Prince George, Duke of Kent, and King George VI.
Because his mother, Princess Marina of Greece and Denmark was a cousin of Prince Philip, Duke of Edinburgh, Edward is both a second cousin and first cousin once removed to Prince Charles and his siblings.
He has held the title of Duke of Kent since the age of six, after the death of his father in a plane crash in 1942.
He carries out engagements on behalf of the Queen.
He is president of the All England Lawn Tennis and Croquet Club, presenting the trophies to the Wimbledon champion and runner-up, and served as the United Kingdom's Special Representative for International Trade and Investment, retiring in 2001.
He is president of The Scout Association, the Royal United Services Institute, and the Royal Institution of Great Britain, and since 1967 Grand Master of the United Grand Lodge of England.
He is also patron of the Institute of Advanced Motorists, an independent road safety charity which specialises in training and advice for post-licence drivers and riders.
Edmund F. Robertson
Edmund Frederick Robertson( born 1 June 1943 in St Andrews, Scotland) is a Professor emeritus of pure mathematics at the University of St Andrews.
Sylvana Tomaselli
Sylvana Palma Windsor, Countess of St Andrews(" née" Tomaselli, previously Jones; born 28 May 1957) is a Canadian- born academic and historian.
She is related to the British royal family as the wife of George Windsor, Earl of St Andrews, elder son of Prince Edward, Duke of Kent.
A historian at the University of Cambridge, she is usually known professionally as Dr Sylvana Tomaselli.
John Hepburn (prior)
John Hepburn( died after 20 July 1525) was the son of Patrick Hepburn, 1st Lord of Hailes and prior of Saint Andrews.
He established Saint Leonard's College at the University of St Andrews in 1512.
In around 1520 he funded the reconstruction of the town walls of St Andrews.
He also served as tutor to Patrick Hepburn, 3rd Earl of Bothwell who succeeded him in the priory in 1522.
He was elected as Archbishop of St Andrews but his appointment was turned down by the Pope.
George Windsor Earl
George Windsor Earl( 1813–1865) was an English navigator and author of works on the Indian Archipelago.
He coined the term' Indu- nesian', later adopted as the name for Indonesia.
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
George Windsor, Earl of St Andrews
George Philip Nicholas Windsor, Earl of St Andrews (born 26 June 1962) is the elder son of Prince Edward, Duke of Kent, and his wife Katharine, Duchess of Kent.
He is styled Earl of St Andrews, one of his father's subsidiary titles, which he holds by courtesy as heir apparent to the Dukedom of Kent.
George Mason II
George Mason II( 1660 – 1716) was an early American planter and statesman.
Mason was the grandfather of George Mason IV, a Founding Father of the United States.
Ralph Neville, 3rd Earl of Westmorland
Ralph Neville, 3rd Earl of Westmorland( c. 1456 – 6 February 1499) was an English peer.
He was the grandfather of Ralph Neville, 4th Earl of Westmorland.

Question: Who is the paternal grandfather of George Windsor, Earl Of St Andrews?
Answer: Prince George, Duke of Kent