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.
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.
Helbirga of Austria
Helbirga of Austria (died 1142), was a Duchess consort of Bohemia, married to Bořivoj II, Duke of Bohemia.
The great wedding of Helbirga, daughter of Leopold II, Margrave of Austria, to Bořivo II was celebrated in October 1100 in Znojmo.
When Bořivoj fled to Hungary in 1120, she moved back to Austria where her brother Leopold III, Margrave of Austria, granted her sanctuary.
She entered Göttweig Abbey where she eventually died in 1142.
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.
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.
Bořivoj II, Duke of Bohemia
Bořivoj II (c. 1064 – 2 February 1124) was the duke of Bohemia from 25 December 1100 until May 1107 and from December 1117 until 16 August 1120.
He was the younger half-brother and successor of Bretislaus II.
His father was Vratislav II of Bohemia, his mother Świętosława of Poland.
He was originally opposed by Duke Ulrich I of Brno, his cousin, who had recovered the stronghold originally confiscated from his father.
A civil war ensued.
Oldřich intended to recognise the suzerainty of Emperor Henry IV, and thereby gain his support, but Bořivoj had already been confirmed by the emperor.
Oldřich was eventually forced to flee to Moravia.
In 1102, Ladislaus I Herman, Duke of Poland, died.
A quarrel broke out in Poland over the succession, with Bořivoj and his cousin Svatopluk supporting Zbigniew against Bolesław III Wrymouth.
Bolesław, however, paid Bořivoj off and the latter withdrew from the conflict.
Svatopluk, furious, defected and led a number of Bohemian grandees with him.
He sought to induce Coloman of Hungary to go to war with Bořivoj, but was unsuccessful until 1107.
In that year, Bořivoj's younger brother Vladislaus rebelled and, with Coloman's help, took Prague.
Svatopluk, who had recently captured and been forced to release Bořivoj by Emperor Henry V, was proclaimed king.
Bořivoj attacked in 1108 with the aid of Bolesław in alliance with Coloman, whom Svatopluk and Henry were jointly attacking in Hungary.
Svatopluk was recalled to fight him off and soon the emperor was invading Poland.
Svatopluk was murdered on this campaign by supporters of Bořivoj, but he could not regain the throne, which went to Vladislaus.
In 1117, the brothers were reconciled and they ruled the duchy jointly (though divided) until 1120, when a new disagreement led Bořivoj to self-exile in Hungary, where he died on 2 February 1124.
He was married to Gerberga, daughter of Leopold II, Margrave of Austria.
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.

Question: Who is Helbirga Of Austria's mother-in-law?
Answer: Świętosława of Poland