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.
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.
Ebba Eriksdotter Vasa
Ebba Eriksdotter Vasa (circa 1491 – 21 November 1549) was a Swedish noblewoman.
She was the mother of Queen Margaret Leijonhufvud and the second cousin and mother-in-law of King Gustav Vasa.
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.
Gallienus
Gallienus (c. 218 – September 268), also known as Gallien, was Roman Emperor with his father Valerian from 22 October 253 to spring 260 and alone from spring 260 to September 268.
He ruled during the Crisis of the Third Century that nearly caused the collapse of the empire.
While he won a number of military victories, he was unable to prevent the secession of important provinces.
His 15-year reign was the longest since the 19-year rule of Septimius Severus.
Born into a wealthy and traditional senatorial family, Gallienus was the son of Valerian and Mariniana.
Valerian became Emperor on 22 October 253 and had the Roman senate elevate Gallienus to the ranks of Caesar and Augustus.
Valerian divided the empire between him and his son, with Valerian ruling the east and his son the west.
Gallienus defeated the usurper Ingenuus in 258 and destroyed an Alemanni army at Mediolanum in 259.
The defeat and capture of Valerian at Edessa in 260 by the Sasanian Empire threw the Roman Empire into the chaos of civil war.
Control of the whole empire passed to Gallienus.
He defeated the eastern usurpers Macrianus Major and Mussius Aemilianus in 261–262 but failed to stop the formation of the breakaway Gallic Empire under general Postumus.
Aureolus, another usurper, proclaimed himself emperor in Mediolanum in 268 but was defeated outside the city by Gallienus and besieged inside.
While the siege was ongoing, Gallienus was stabbed to death by the officer Cecropius as part of a conspiracy.
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.
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.
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.
Cornelia Salonina
Julia Cornelia Salonina (died 268, Mediolanum) was an "Augusta" of the Roman Empire, married to Roman Emperor Gallienus and mother of Valerian II, Saloninus, and Marinianus.
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 Cornelia Salonina's mother-in-law?
Answer: Mariniana