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.
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.
Alfonso, Prince of Asturias (1907–1938)
Alfonso, Prince of Asturias (10 May 1907 – 6 September 1938), was heir apparent to the throne of Spain from birth until he renounced his rights in 1933.
He was the eldest son of Alfonso XIII and his wife Victoria Eugenie of Battenberg.
Alfonso's renunciation of his rights as heir to the throne of Spain in order to marry Cuban commoner Edelmira Sampedro caused controversy at the time.
A similar situation would take place 3 years later in Britain with his cousin Edward VIII, who would abdicate as King of the United Kingdom to wed American divorcee Wallis Simpson.
He died at the age of 31 as a result of a car accident.
Though appearing to have sustained minor injuries, his haemophilia, inherited by him from his great-grandmother Queen Victoria, led to fatal internal bleeding.
Doria Ragland
Doria L. Ragland( born September 2, 1956) is the mother of Meghan, Duchess of Sussex, the mother- in- law of Prince Harry, and the maternal grandmother of Archie Mountbatten- Windsor, who is seventh in line to the British throne.
She is a former makeup artist, business owner, yoga instructor, and former social worker who worked in the mental health sector from 2015 to 2018.
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.
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.
Marta Esther Rocafort-Altuzarra
Marta Esther Rocafort y Altuzarra, later hyphenated Rocafort-Altuzarra (18 September 1913 in Havana – 4 February 1993 in Miami, Miami-Dade County, Florida) was the second wife of the Count of Covadonga (previously known as Alfonso, Prince of Asturias).
Rocafort, a fashion model, was the eldest daughter of Blas Manuel Rocafort y González, a prominent Cuban dentist, and wife Rogelia Altuzarra y Carbonell.
Her siblings were Elvira and Blas Rocafort y Altuzarra, later hyphenated Rocafort-Altuzarra.
Rocafort began dating the Count in New York City before his first marriage to Edelmira Sampedro y Robato ended.
On 3 July 1937, the Count married Rocafort-Atuzarrra in a lavish wedding in Havana, Cuba attended by the President of Cuba, Federico Laredo Brú.
Two months later they separated and on 8 January 1938, they were divorced in New York City.
The widowed countess then married the Miami millionaire, Thomas E. H. "Tommy" Atkins, Jr.
at the Central Baptist Church in Miami on 19 March 1938.
Her former husband died six months later in Miami on 6 September 1938.
Marta Atkins married a third time to Rodolfo Caballero.
Her nephew is the Spanish fashion designer Juanjo Rocafort (Juan José Rocafort Huete).
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.
Donna Harun
Donna Harun( born February 21, 1968) is an Indonesian actress and model of Dutch- Indonesian descent.
She is the mother of actor Ricky Harun and mother- in- law of the actress and model Herfiza Novianti.
Baroness Gösta von dem Bussche-Haddenhausen
Baroness Gösta von dem Bussche- Haddenhausen( 26 January 1902 – 13 June 1996) was the mother of Prince Claus of the Netherlands, who was the Prince Consort of Queen Beatrix of the Netherlands, thus making her the mother- in- law of the former Dutch Queen.
She is also the paternal grandmother of King Willem- Alexander of the Netherlands, who is the current Dutch King.

Question: Who is Marta Esther Rocafort-Altuzarra's mother-in-law?
Answer: Victoria Eugenie of Battenberg