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.
Lady Teresa Waugh
Lady Teresa Lorraine Waugh (née Onslow; born 26 February 1940) is a British novelist and translator.
She is the daughter of the 6th Earl of Onslow and his first wife, Pamela Dillon.
On 1 July 1961, Lady Teresa married the author Auberon Waugh, eldest son of Evelyn Waugh.
Lady Teresa has translated such works as Anka Muhlstein's "A Taste For Freedom: The life of Astolphe de Custine" (2000), Benedetta Craveri's "Madame Du Deffand and Her World" (1994) and "The Travels of Marco Polo" (1984), In 1980 she translated the book of Iran Shah" Muahammed radah" from Persian to English under the name of " Replay to history, 'the story of shah life'".
She has also written her own novels, including "Painting Water" (1983), "Waterloo Waterloo" (1985), "Intolerable Burden" (1987), "Song at Twilight" (1989),
"The House" (2002), "Sylvia's Lot" (1994), "The Entertaining Book" (1986) and
"The Gossips" (1995).
Auberon and Lady Teresa Waugh had four children together:
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Prithvipati Shah
Prithvipati Shah( ?–1716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.
He was the grandfather of Nara Bhupal Shah.
Pamela Dillon, Countess of Onslow
Pamela Louisa Eleanor Dillon (born 26 August 1915 – died 1992) was the daughter of Eric Dillon, 19th Viscount Dillon.
She married the 6th Earl of Onslow on 4 August 1936, several weeks before her 21st birthday.
The marriage was dissolved by divorce in 1962.
The couple had two children: Michael William Coplestone Dillon Onslow, 7th Earl of Onslow (28 February 1938 – 14 May 2011), and Lady Teresa Lorraine Onslow (born 26 February 1940).
Teresa Onslow married Catholic writer/editor Auberon Waugh.
Auberon and Teresa Waugh had four children.
Dillon held the office of Justice of the Peace for Guildford in 1950.
Henry Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.
He was the grandfather of Emperor Yōzei.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.

Question: Who is Lady Teresa Waugh's maternal grandfather?
Answer: Eric Dillon, 19th Viscount Dillon