Taejo of Joseon
Taejo of Joseon (October 27, 1335 – May 24, 1408), born Yi Seong-gye, whose changed name is Yi Dan, was the founder and the first king of the Joseon dynasty of Korea reigning from 1392 to 1398, and the main figure in overthrowing the Goryeo Dynasty.
Taejo's father Yi Ja-chun was a minor Mongol official, but his ethnicity was Korean.
Taejo's mother Queen Uihye was originally Chinese from the Yantai-Weihai area of Shandong.
Taejo joined the Goryeo army and rose through the ranks, seizing the throne in 1392.
He abdicated in 1398 during the strife between his sons and died in 1408.
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.
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.
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.
Queen Sindeok
Queen Sindeok (12 July 1356 – 15 September 1396) (신덕왕후 강씨) was the second wife and Queen Consort of King Taejo of Joseon, the first monarch of the Korean Joseon Dynasty.
She was a political advisor of King Taejo and had a great influence on the founding of Joseon.
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.
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.
Gang Yun-seong
Gang Yun- Seong was a civilian of the Korean kingdom of Goryeo.
He was a father of Queen Sindeok who was the second wife of King Taejo of Joseon or known as Yi Seong- gye.
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.

Question: Who is the mother-in-law of Queen Sindeok?
Answer: Queen Uihye