Thamar Angelina Komnene
Thamar Angelina Komnene (late 13th century) was a Princess of Taranto by marriage to Prince Philip I.
Maria Thins
Maria Thins( c. 1593 – 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family.
Priscilla Pointer
Priscilla Marie Pointer( born May 18, 1924) is an American stage, film and television character actress.
She began her career in the theater, including productions on Broadway.
Later, Pointer moved to Hollywood to act in films and on television.
She is the mother of Amy Irving, therefore making her the former mother- in- law of filmmakers Steven Spielberg and Bruno Barreto and the mother- in- law of documentary filmmaker Kenneth Bowser, Jr.
Isabella of Clermont
Isabella of Clermont (– 30 March 1465), also known as Isabella of Taranto, was a Sovereign Princess of Taranto and first Queen consort of Ferdinand I of Naples.
Maria Teresa Felicitas d'Este
Maria Teresa Felicitas d'Este (October 6, 1726 – April 30, 1754) was born a princess of Modena and was by marriage the Duchess of Penthièvre.
She was the mother-in-law of Philippe Égalité and thus grandmother to the future Louis-Philippe of France.
Vera Miletić
Vera Miletić (Serbian Cyrillic: Вера Милетић; 8 March 1920 – 7 September 1944) was a Serbian student and soldier.
She was notable for being the mother of Mira Marković, posthumously making her the mother-in-law of Serbian president Slobodan Milošević.
Cornelia (mother of the Gracchi)
Cornelia( c. 190s – c. 115 BC) was the second daughter of Publius Cornelius Scipio Africanus, the hero of the Second Punic War, and Aemilia Paulla.
She is remembered as a prototypical example of a virtuous Roman woman.
She was the mother of the Gracchi brothers, and the mother- in- law of Scipio Aemilianus.
Eldon Howard
Eldon Howard was a British screenwriter.
She was the mother- in- law of Edward J. Danziger and wrote a number of the screenplays for films by his company Danziger Productions.
Marian Shields Robinson
Marian Lois Robinson( née Shields; born July 29, 1937) is the mother of Michelle Obama, former First Lady of the United States, and Craig Robinson, a basketball executive, and the mother- in- law of former U.S. President Barack Obama.
Ferdinand I of Naples
Ferdinand I (2 June 1423 – 25 January 1494), also called Ferrante, was King of Naples from 1458 to 1494.
He was the son of Alfonso V of Aragon and his mistress, Giraldona Carlino.

Question: Who is Isabella Of Clermont's mother-in-law?
Answer: Giraldona Carlino