Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
William Cavendish, 4th Duke of Devonshire
William Cavendish, 4th Duke of Devonshire, (8 May 1720 – 2 October 1764), styled Lord Cavendish before 1729 and Marquess of Hartington between 1729 and 1755, was a British Whig statesman and nobleman who was briefly nominal Prime Minister of Great Britain.
He was the first son of William Cavendish, 3rd Duke of Devonshire and his wife, the former Catherine Hoskins.
Richard Cavendish, 2nd Baron Waterpark
Richard Cavendish, 2nd Baron Waterpark FSA( 13 July 1765 – 1 June 1830), was an Anglo- Irish politician and peer.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Richard Cavendish (1794–1876)
The Hon. Richard Cavendish( 23 December 1794 – 18 March 1876) was an English nobleman, politician, Member of Parliament, and a member of the Canterbury Association.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Lord Richard Cavendish (1871–1946)
Lord Richard Frederick Cavendish( 31 January 1871 – 7 January 1946), known as Richard Cavendish until 1908, was a British aristocrat, author, magistrate, and politician.
Lord Richard Cavendish (1752–1781)
Lord Richard Cavendish (19 June 1752 – 7 September 1781) was an English nobleman and politician.
He was the second son of William Cavendish, 4th Duke of Devonshire and his wife, Charlotte.
Cavendish was educated in Hackney and at Trinity College, Cambridge.
In 1773, he entered the House of Commons as MP for Lancaster, and moved to No. 1 Savile Row, London, where he resided until 1781.
He was one of the few attendees at his brother Devonshire's wedding in 1774.
In 1781, he went abroad in hopes of recovering his failing health; but he continued to decline and died unmarried in Naples.
Hugh Cavendish, Baron Cavendish of Furness
( Richard) Hugh Cavendish, Baron Cavendish of Furness( born 2 November 1941), otherwise known as Hugh Cavendish, is a British Conservative politician and landowner.
Lord Cavendish owns Holker Hall and its 17,000 acre estate overlooking Morecambe Bay in Cumbria.
The property became part of this branch of the Cavendish family's inheritance via his grandfather, Lord Richard Cavendish.
Lord Richard Cecil
Lord Richard Valentine Gascoyne- Cecil( 26 January 1948 – 20 April 1978) was a British soldier, Conservative politician and freelance journalist who was killed in Rhodesia whilst covering the country's Bush War.
The second son of the 6th Marquess of Salisbury, Lord Richard was in Rhodesia with a freelance film- maker, Nick Downie, recording material for a television documentary about the war.
Carrying a rifle and wearing a Rhodesian Army uniform, he was shot dead at close range by a member of the Zimbabwe African National Liberation Army.
The Rhodesian government reported that Lord Richard had been" killed in action"; his body was returned to the United Kingdom for burial.
The Cecil family had long- standing connections with Rhodesia.
The death of Lord Richard was one of a number of events during 1978 that brought Rhodesia's Unilateral Declaration of Independence( UDI) to an abrupt end; it was the identity of the deceased, and the nature of his loss, that affected UDI's supporters.

Question: Who is Lord Richard Cavendish (1752–1781)'s paternal grandfather?
Answer: William Cavendish, 3rd Duke of Devonshire