Catherine of Brunswick-Lüneburg
Catherine of Brunswick- Lüneburg( 1395 – 28 December 1442, Grimma) was a member of the House of Welf, a princess of Brunswick- Lüneburg and by marriage, the Electress of Saxony.
Margaret of Brunswick-Lüneburg (1442–1512)
Margaret of Brunswick- Lüneburg( 1442 – 8 April 1512 in Wienhausen) was a princess of Brunswick- Lüneburg by birth and by marriage a Duchess of Mecklenburg- Stargard.
Maria Amalia, Holy Roman Empress
Maria Amalia of Austria
( Maria Amalie Josefa Anna; 22 October 1701 – 11 December 1756) was Holy Roman Empress, Queen of the Germans, Queen of Bohemia, Electress and Duchess of Bavaria etc. as the spouse of Emperor Charles VII.
By birth, she was an archduchess of Austria, the daughter of Emperor Joseph I and Wilhelmine Amalia of Brunswick- Lüneburg.
Maria Amalia had seven children, only four of whom lived through to adulthood, including Maximilian III, Elector of Bavaria.
Matilda of Brunswick-Lüneburg
Matilda of Brunswick- Lüneburg( 1276 – 26 April 1318) was a German noblewoman and member of the House of Welf.
By birth, she was a duchess of Brunswick- Lüneburg and by marriage Duchess of Glogów, Ścinawa, etc.
She was the seventh child and only daughter of Albert I, Duke of Brunswick- Lüneburg by his second wife Alessina, daughter of Margrave Boniface II of Montferrat.
Wilhelmine Amalia of Brunswick-Lüneburg
Wilhelmine Amalia of Brunswick-Lüneburg (21 April 1673 – 10 April 1742) was Holy Roman Empress, Queen of the Germans, Queen of Hungary, Queen of Bohemia, Archduchess consort of Austria etc.
as the spouse of Joseph I, Holy Roman Emperor.
Dorothea of Brunswick-Lüneburg
Dorothea of Brunswick-Lüneburg (1 January 1570 – 15 August 1649) was a daughter of Duke William "the younger" of Brunswick-Lüneburg and his wife, Dorothea of Denmark, Duchess of Brunswick-Lüneburg.
She married Count Palatine Charles I of Zweibrücken-Birkenfeld.
They had four children:
Francis Otto, Duke of Brunswick-Lüneburg
Francis Otto, Duke of Brunswick- Lüneburg( 1530 – 1559) was the Prince of Lüneburg from 1555 to 1559.
He was the son of Ernest I, Duke of Brunswick- Lüneburg.
Henry the Peaceful, Duke of Brunswick-Lüneburg
Henry the Peaceful( 1411 – 7 December 1473), Duke of Brunswick- Lüneburg, called the Peaceful, ruled over both parts of Brunswick- Lüneburg.
Elizabeth of Denmark, Duchess of Brunswick-Wolfenbüttel
Elisabeth of Denmark (25 August 1573 – 19 July 1625) was duchess consort of Brunswick-Lüneburg as married to Duke Henry Julius of Brunswick-Lüneburg.
She was regent of Brunswick-Lüneburg in 1616-1622.
Joseph I, Holy Roman Emperor
Joseph I (Joseph Jacob Ignaz Johann Anton Eustachius; 26 July 1678 – 17 April 1711) was Holy Roman Emperor from 1705 until his death in 1711.
He was the eldest son of
Emperor Leopold I from his third wife, Eleonor Magdalene of Neuburg.
Joseph was crowned King of Hungary at the age of nine in 1687 and King in Germany at the age of eleven in 1690.
He succeeded to the thrones of Bohemia and the Holy Roman Empire when his father died.
Joseph continued the War of the Spanish Succession, begun by his father against Louis XIV of France, in a fruitless attempt to make his younger brother Charles
(later Emperor Charles VI) King of Spain.
In the process, however, owing to the victories won by his military commander, Prince Eugene of Savoy, he did succeed in establishing Austrian hegemony over Italy.
Joseph also had to contend with a protracted revolt in Hungary, fomented by Louis XIV.
Neither conflict was resolved until the Treaty of Utrecht, after his death.
He also sanctioned the extermination of Romani people within the Holy Roman Empire.
His motto was "Amore et Timore" (Latin for "Through Love and Fear").

Question: Who is Wilhelmine Amalia Of Brunswick-Lüneburg's mother-in-law?
Answer: Eleonor Magdalene of Neuburg