Beatrice of Coimbra
Infanta Beatrice of Coimbra (1435–1462) was the 5th child of Infante Peter, Duke of Coimbra, and Isabella of Urgell.
After the battle of Alfarrobeira, where her father's army was defeated by the Portuguese royal army, she left the country and took refuge in Burgundy, under her aunt
’s protection:
Isabella of Portugal was married to Duke Philip III the Good.
In 1453, Beatrice married Adolph of Cleves, Lord of Ravenstein, nephew of the Duke Philip III the Good.
They had issue:
She died in Bruges of suspected poisoning in 1462.
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.
John, Prince of Antioch
John, Prince of Antioch( 1431 – 1457), was the second son of Infante Peter, Duke of Coimbra, and Isabella of Urgell, Duchess of Coimbra.
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.
Beatrice of Portugal, Duchess of Savoy
Infanta Beatrice of Portugal( 31 December 1504 – 8 January 1538) was Duchess of Savoy by marriage to Charles III, Duke of Savoy.
She was the Sovereign Countess of Asti from 1531 to 1538.
Adolph of Cleves, Lord of Ravenstein
Adolph of Cleves, Lord of Ravenstein
(1425–1492) was the youngest son of Adolph I, Duke of Cleves, and of his wife Marie of Burgundy, a sister of Philip the Good, Duke of Burgundy.
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.
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.
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.
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.

Question: Who is the mother-in-law of Beatrice Of Coimbra?
Answer: Marie of Burgundy