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

Knowledge 1: 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). [SEP] Knowledge 2: 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:
Knowledge 1: 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). [SEP] Knowledge 2: 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).
Knowledge 1: 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). [SEP] Knowledge 2: Archie Hamilton
Archibald Gavin Hamilton, Baron Hamilton of Epsom,( born 30 December 1941) is a British Conservative Party politician.

Answer: Archibald James Hamilton