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.
Maria of Antioch-Armenia
Maria of Antioch-Armenia (1215–1257) was lady of Toron from 1229 to her death.
She was the elder daughter of Raymond-Roupen, prince of Antioch, and of Helvis of Lusignan.
She derived her title of Lady of Toron and claim to the throne of Armenia from her father.
Maria's paternal grandmother Alice became lady of Toron when emperor Frederick II, at the end of the Sixth Crusade, negotiated the return of lands conquered by Saladin; Maria succeeded her as she was the closest surviving relative.
In 1240 she married Philip of Montfort, Lord of Tyre, previously lord of Castres, and they had the following children:
She was the great-granddaughter of Roupen III, prince of Armenia (Roupen III's daughter was Alice), who had been succeeded by his brother Leo I. Maria thus unsuccessfully claimed rights to the throne of Armenia, something her father and grandmother had previously attempted and failed.
Philip of Montfort, Lord of Tyre
Philip Ι of Montfort, (d. 17 March 1270,Tyre) was Lord of La Ferté-Alais and Castres-en-Albigeois 1228–1270, Lord of Tyre 1246–1270, and Lord of Toron aft.
1240–1270.
He was the son of Guy of Montfort and Helvis of Ibelin (daughter of Balian of Ibelin).
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.
Athanasius I Gammolo
Athanasius I Gammolo was the Patriarch of Antioch, and head of the Syriac Orthodox Church of Antioch from 595 until his death in 631.
Athanasius was also the author of" The Life of Severus of Antioch", a biography of the first Syriac Orthodox Patriarch of Antioch.
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.
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.
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.

Question: Who is Maria Of Antioch-Armenia's mother-in-law?
Answer: Helvis of Ibelin