James Gordon, 2nd Viscount Aboyne
James Gordon, 2nd Viscount Aboyne( c. 1620 – February 1649) was the second son of George Gordon, 2nd Marquess of Huntly, a Scottish royalist commander in the Wars of the Three Kingdoms.
Thomas Gladstones
Thomas Gladstones( 3 June 1732 – 12 May 1809) was a Scottish merchant and philanthropist.
He was the father of Sir John Gladstone and the grandfather of the British prime minister William Ewart Gladstone.
Sir John Nicolson, 2nd Baronet
Sir John Nicolson, 2nd Baronet, of Lasswade was a member of the Parliament of Scotland.
James Smith (1587–1667)
James Smith( 1587– 1667, alias James Smyth) of Hammersmith, Middlesex, was an Alderman of the City of London a member of the Worshipful Company of Salters and a Governor of Christ's Hospital in London.
His monument survives in St Paul's Church, Hammersmith.
He was the grandfather of Sir John Smith, 1st Baronet, of Isleworth.
William Duff-Gordon
Sir William Duff- Gordon, 2nd Baronet( 8 April 1772 – 8 March 1823), known as William Gordon until 1815, was a Scottish politician.
Duff- Gordon was the son of the Hon. Alexander Gordon, Lord Rockville, son of William Gordon, 2nd Earl of Aberdeen.
His mother was Anne, daughter of William Duff.
He was returned to Parliament as one of two representatives for Worcester in 1807, a seat he held until 1818.
In 1815, he succeeded his uncle Sir James Duff, 1st Baronet, as 2nd Baronet of Halkin according to a special remainder, and assumed the same year by Royal licence the additional surname of Duff.
Duff- Gordon married Caroline Cornewall, youngest daughter of Sir George Cornewall, on 5 February 1810.
He died in March 1823, aged 50, and was succeeded in the baronetcy by his son Alexander.
Sir John Gordon, 1st Baronet, of Haddo
Sir John Gordon, 1st Baronet (1610 – 19 July 1644) was a Scottish Royalist supporter of Charles I during the Wars of the Three Kingdoms.
Gordon distinguished himself against the covenanters at Turriff, 1639, and joined Charles I in England.
Created a baronet in 1642 for his services, he was excommunicated and forced to surrender by the Covenanters under Argyll at Kellie in 1644 and was subsequently beheaded for treason at Edinburgh.
John was the son of George Gordon (eldest son of James Gordon of Haddo and Methlick), and Margaret, daughter of Sir Alexander Bannerman.
George predeceased his father, and John succeeded to his grandfather's estates on the latter's death in November 1624.
John Lorimer (British Army officer)
Lieutenant General Sir John Gordon Lorimer,( born 27 November 1962) is a senior British Army officer.
Sir John Gordon, 2nd Baronet, of Haddo
Sir John Gordon, 2nd Baronet (c. 1632–1665) was the eldest son of Sir John Gordon, 1st Baronet, of Haddo and Mary Forbes.
He succeeded to the title of 2nd Baronet on the execution of his father for treason on 19 July 1644, but due to his father's attainder, was under forfeiture until the Restoration in 1660.
On his death in 1665 without male issue the baronetcy devolved upon his younger brother, who was later created 1st Earl of Aberdeen.
John Gordon Kennedy
Sir John Gordon Kennedy,( 18 July 1836 – 2 December 1912) was a British diplomat.
Sir John Inglis, 2nd Baronet
Sir John Inglis of Cramond, 2nd Baronet( September 1683 – 3 March 1771) was Postmaster General for Scotland, the son and heir of Sir James Inglis, 1st Baronet of Cramond, Edinburghshire by his spouse Anne, daughter of Sir Patrick Houstoun, 1st Baronet of that Ilk.
He succeeded his father in 1688.

Question: Who is Sir John Gordon, 2Nd Baronet, Of Haddo's paternal grandfather?
Answer: George Gordon