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.
Hedwig of Denmark
Princess Hedwig of Denmark (5 August 1581 – 26 November 1641) was the youngest daughter of King Frederick II of Denmark and Sophie of Mecklenburg-Güstrow, and Electress of Saxony from 1602 to 1611 as the wife of Christian II.
The marriage was childless, and her husband was succeeded by his brother John George.
After Christian's death in 1611, the Dowager Electress Hedwig held a powerful position in Saxony.
Ellen Marsvin
Ellen Marsvin (1 February 1572 – 11 November 1649) was a Danish noble, landowner and county administrator.
She was the mother-in-law of King Christian IV of Denmark, the mother of Kirsten Munk (1598–1658) and grandmother of Leonora Christina Ulfeldt (1621–1698).
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.
Christian II, Elector of Saxony
Christian II of Saxony (23 September 1583 – 23 June 1611) was Elector of Saxony from 1591 to 1611.
He was born in Dresden, the eldest son of Christian I of Saxony and Sophie of Brandenburg.
He belonged to the Albertine line of the House of Wettin.
Christian succeeded his father as Elector of Saxony in 1591 at the age of eight.
Because of his youth, his mother Sophie of Brandenburg and his kinsman, Duke Frederick William
I of Saxe-Weimar, assumed the regency of the Electorate until 1601, when Christian was declared an adult and began to govern.
In the course of the event that eventually led to the Thirty Years' War, his refusal to join the Union of Auhausen deepened the division between the Protestant German states.
In Dresden, on September 12, 1602, Christian married Hedwig, daughter of the King Frederick II of Denmark.
This marriage was childless.
He died in Dresden in 1611.
Having left no issue, on his death his brother John George succeeded him as Elector.
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.
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.
Hedwig of Gudensberg
Hedwig of Gudensberg, also known as" Hedwig of Hesse"( 1098 – 1148) was German regent: she served as regent of Thuringia during the minority of her son Louis II from 1140.
Princess Caroline-Mathilde of Denmark
Princess Caroline- Mathilde of Denmark( 27 April 1912 – 12 December 1995) was a daughter of Prince Harald of Denmark and granddaughter of King Frederick VIII of Denmark.
As the wife of Knud, Hereditary Prince of Denmark, she became Hereditary Princess of Denmark.
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 Hedwig Of Denmark's mother-in-law?
Answer: Sophie of Brandenburg