George Hamilton, 4th Baron Hamilton of Strabane
George Hamilton, 4th Baron Hamilton of Strabane( 1636 or 1637 – 1668) was the younger son of Claud Hamilton, 2nd Baron Hamilton of Strabane.
He succeeded to the title in 1655 when his brother drowned while bathing in the River Mourne.
After the Restoration, he obtained the return of some of the family lands around Strabane, which had been confiscated by the Parliamentarians in 1650.
Claud Hamilton, 2nd Baron Hamilton of Strabane
Claud Hamilton, 2nd Baron Hamilton of Strabane( – 1638) was the founder of the Strabane branch of the Hamiltons.
He died relatively young at about 32 and his wife, Jean Gordon, married Phelim O'Neill, one of the leaders of the 1641 rebellion, after his death.
James Hamilton, 4th Baron Hamilton of Dalzell
James Leslie Hamilton, 4th Baron Hamilton of Dalzell( 11 February 1938 – 28 September 2006) was a British Conservative Party hereditary peer.
Gavin Hamilton, 2nd Baron Hamilton of Dalzell
Gavin George Hamilton, 2nd Baron Hamilton of Dalzell, KT, CVO, MC (29 June 1872 – 23 June 1952), was a Scottish Liberal politician.
Hamilton was the eldest surviving son of John Hamilton, 1st Baron Hamilton of Dalzell, and his wife Lady Emily Eleanor, daughter of Alexander Leslie-Melville, 10th Earl of Leven.
He was commissioned a second lieutenant in the Scots Guards on 30 March 1892, and promoted to lieutenant on 20 March 1897, but resigned and was appointed to the Reserve in January 1900 with the rank of captain.
He volunteered for service in the Second Boer War in South Africa the following month, and was appointed a lieutenant in the 4th Battalion Imperial Yeomanry on 17 February 1900.
Attached to the 28th (Bedfordshire) company, he left Albert Docks in the SS "Kent" in early February 1900, and arrived at South Africa the following month.
He succeeded his father in the barony in 1900 and took his seat on the Liberal benches in the House of Lords.
From 1905 to 1911 he served under Sir Henry Campbell-Bannerman and later H. H. Asquith as a Lord-in-waiting (government whip in the House of Lords).
He was appointed a Deputy Lieutenant of Lanarkshire in September 1901, and served as Lord-Lieutenant of Lanarkshire between 1938 and 1952.
In 1909 he was made a Knight of the Thistle.
Lord Hamilton of Dalzell married Sybil Mary, daughter of Lieutenant-General Sir Frederick Marshall, in 1912.
She died in 1933.
Hamilton survived her by nineteen years and died in June 1952, aged 79.
He was succeeded in the barony by his nephew John (1911-1990).
Douglas Hamilton, 8th Duke of Hamilton
Douglas Hamilton, 8th Duke of Hamilton, 5th Duke of Brandon and 2nd Baron Hamilton of Hameldon,( 24 July 1756 – 2 August 1799) was a Scottish peer, nobleman, and politician.
John Hamilton, 1st Baron Hamilton of Dalzell
John Glencairn Carter Hamilton, 1st Baron Hamilton of Dalzell (1829–1900), was a Scottish soldier and politician.
Hamilton was born in Marseilles, France, the only son of Archibald James Hamilton, 12th of Orbiston (1793–1834), and was educated at Eton College.
He served in the 2nd Life Guards, rising to the rank of commissioned cornet in 1847, lieutenant in 1849 and captain in 1854.
In 1856 he was appointed major in the Queen’s Own Royal Glasgow and Lower Ward of Lanarkshire Yeomanry Cavalry.
Although retiring from the regular Army in 1860, he continued to serve in the Yeomanry until 1885.
He began his political career in 1857 as Liberal Member of Parliament (MP) for Falkirk Burghs, serving for two years.
He later sat for Lanarkshire South in 1868–74 and 1880–86.
He also served as a Justice of the Peace, and as Deputy Lieutenant and Vice-Lord Lieutenant for Lanarkshire.
In 1886, Hamilton was raised to the peerage as Baron Hamilton of Dalzell.
He served in William Ewart Gladstone's government as a Lord-in-waiting from 1892 to 1894.
The Hamiltons made large amounts of money in the nineteenth century, as the lands they held in Lanarkshire were sold for coal exploitation.
In the late 1850s and 1860s Hamilton was able to greatly extend his home of Dalzell House, a former tower house outside Motherwell, laying out landscaped grounds at the same time.
In 1864 he married Lady Emily Leslie-Melville (died 1882), daughter of David Leslie-Melville, 8th Earl of Leven, and had issue:
Archie Hamilton
Archibald Gavin Hamilton, Baron Hamilton of Epsom,( born 30 December 1941) is a British Conservative Party politician.
James Hamilton, 2nd Earl of Abercorn
James Hamilton, 2nd Earl of Abercorn( – c. 1670) was a Scottish peer.
He, his wife, his mother, and most of his family were recusants( Catholics).
Implementing his father's will he gave his Irish title of Baron Hamilton of Strabane to his younger brother Claud.
His younger brothers had inherited his father's Irish lands, while he received the Scottish ones, which he squandered away, being deep in debt in his later days.
Gavin Hamilton (bishop of Galloway)
Gavin Hamilton( 1561 – 1612), bishop of Galloway, was the second son of John Hamilton of Orbiston, Lanarkshire.
The father, descended from Sir James Hamilton of Cadzow, fell at the battle of Langside, fighting for Mary, Queen of Scots( 13 May 1568).
George Hamilton, 3rd Earl of Abercorn
George Hamilton, 3rd Earl of Abercorn( – before 1683) died unmarried in Padua on a voyage to Rome.
He was succeeded by Claud Hamilton, heir of Claud Hamilton, 2nd Baron Hamilton of Strabane, second son of the 1st Earl of Abercorn.

Question: Who is Gavin Hamilton, 2Nd Baron Hamilton Of Dalzell's paternal grandfather?
Answer: Archibald James Hamilton