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.
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.
Berno, Apostle of the Obotrites
Berno, Bishop of Schwerin, also known as the Apostle of the Obotrites or Berno of Amelungsborn( died 14 January 1191) was a pre-eminent missionary to the Obotrites in the territory of Mecklenburg, Germany, and the first Bishop of Schwerin.
Olof Skötkonung
Olof Skötkonung (c. 980–1022) was King of Sweden, son of Eric the Victorious and, according to Icelandic sources, Sigrid the Haughty.
He succeeded his father in c. 995.
He stands at the threshold of recorded history, since he is the first Swedish ruler about whom there is substantial knowledge.
He is regarded as the first king known to have ruled both the Swedes and the Geats.
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.
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.
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.
Edla
Edla, traditionally called Edla, Duchess of Venden(" Edla, hertiginna av Venden")( 10 th- 11th centuries), was a Slavic Viking age woman.
She was the mother of King Emund of Sweden and Queen Astrid of Norway.
Tradition says Edla was the daughter of a Lechitic Tribal chief who has ruled part of terrain between Oder and Elbe.
She was brought to Sweden as a prisoner of war c. 1000 at the same time or a little before, the arrival of Estrid of the Obotrites(" Estrid av obotriterna").
King Olof Skötkonung married Estrid but also fell in love with Edla and took her as his mistress.
She became the mother of Emund, Astrid, and probably Holmfrid.
Snorre Sturlasson says that her children were sent to foster parents away from the royal court because Queen Estrid was not kind to them.
This could indicate that Edla died when her children were small.
Estrid of the Obotrites
Estrid (or Astrid) of the Obotrites (c. 979 – 1035) was a Viking age Swedish queen and West Slavic princess, married to Olof Skötkonung, the King of Sweden, c. 1000–1022, mother of King Anund Jacob of Sweden and the Kievan Rus' saint and grand princess Ingegerd Olofsdotter.

Question: Who is Estrid Of The Obotrites's mother-in-law?
Answer: Sigrid the Haughty