Margravine Hedwig Sophie of Brandenburg
Hedwig Sophia of Brandenburg( 14 July 1623, Berlin- 26 June 1683, Schmalkalden) was Landgravine consort of Hesse- Kassel by marriage to William VI, Landgrave of Hesse- Kassel, and regent from 1663 until 1677 during the minority of her sons, William VII, Landgrave of Hesse- Kassel and Charles I, Landgrave of Hesse- Kassel.
Charles I, Landgrave of Hesse-Kassel
Charles of Hesse- Kassel( 3 August 1654 – 23 March 1730), of the House of Hesse, was the Landgrave of Hesse- Kassel from 1670 to 1730.
George Charles of Hesse-Kassel
George Charles of Hesse-Kassel (8 January 1691 – 5 March 1755) was a prince of Hesse-Kassel and a Prussian General.
Prince William of Hesse-Kassel
Prince William of Hesse- Kassel( 24 December 1787 – 5 September 1867), was the first son of Prince Frederick of Hesse- Kassel and Princess Caroline of Nassau- Usingen.
Maximilian of Hesse-Kassel
Maximilian of Hesse-Kassel (28 May 1689 – 8 May 1753) was a prince of Hesse-Kassel and a Generalfeldzeugmeister, Generalfeldmarschall and finally Reichsgeneralfeldmarschall in the army of the Holy Roman Empire.
William VII, Landgrave of Hesse-Kassel
William VII of Hesse- Kassel( 21 June 1651 – 21 November 1670) was Landgrave of Hesse- Kassel.
Princess Wilhelmina Caroline of Denmark
Princess Wilhelmina" Caroline" of Denmark and Norway( 10 July 1747 in Christiansborg Palace, Copenhagen – 14 January 1820 in Kassel), was the Landgravine consort of Hesse- Kassel and later the Electress of Hesse- Kassel by marriage to William I, Elector of Hesse.
Princess Karoline Amalie of Hesse-Kassel
Karoline Amalie of Hesse- Kassel( 11 July 1771, Hanau – 22 February 1848, Gotha), was a German princess and member of the House of Hesse- Kassel by birth, and Duchess of Saxe- Gotha- Altenburg by marriage.
She was the second daughter of Landgrave( later Prince) William I of Hesse by Princess Wilhelmina Caroline of Denmark and Norway, daughter of King Frederick V.
Princess Wilhelmina of Hesse-Kassel
Wilhelmina of Hesse-Kassel (25 February 1726 – 8 October 1808) was a Prussian princess, married to Prince Henry of Prussia.
Wilhelmina was the daughter of Prince Maximilian of Hesse-Kassel and Friederike Charlotte of Hesse-Darmstadt, and the niece of William VIII, Landgrave of Hesse-Kassel and King Frederick
I of Sweden.
She was introduced to Henry when he visited Kassel in 1751 and was married to him 25 June 1752.
Wilhelmina was described as a charming beauty.
Wilhelmina and Henry had their own court and lived at Schloss Rheinsberg and Berlin.
Wilhelmina had no children with Henry, who was reported to pay more attention to his male friends than to her.
The couple separated in 1766 after an alleged affair on Wilhelmina's side.
After the separation, she lived at Palais Unter den Linden in Berlin, where she was served by successive members of the von Blumenthal family (Amalia, Charlotte, Marie-Thérèse and Leopoldine) as ladies-in-waiting .
The Swedish princess Hedvig Elisabeth Charlotte of Holstein-Gottorp described her at the time of her visit in 1798:
She was a tall and handsome lady with a well kept figure, though very thin, and you can still see how remarkably beautiful she was in her youth.
Her eyes are big and lively though somewhat protruding, and with a restless look.
She is witty and literal, but as a consequence of her age, she sometimes talks of several subjects at the same time.
Her manners are regal, and she represents perfectly, and was additionally very polite and toward me very pleasant.
She was one of the few members of the royal house to remain in Berlin during the French occupation in 1806.
While most of the royal family left, reportedly because of the anti-Napoleonic criticisms they had expressed, and the members of the royal court either followed them or left the capital for their country estates, Wilhelmina remained with Prince Augustus Ferdinand of Prussia and his consort Margravine Elisabeth Louise of Brandenburg-Schwedt because of "their high age" as well as Princess Augusta of Prussia, who was pregnant at the time.
Marie Anne Victoire Pigeon
Marie Anne Victoire Pigeon d' Osangis( 1724, Paris – 1767, Berlin) was a French mathematician and writer.
She was the daughter of the scientist Jean Pigeon.
In 1744, she eloped with her teacher, mathematician Pierre Le Guay de Prémontval, to Switzerland, where they married, and then to Berlin.
In 1752, she was a teacher of princess Wilhelmina of Hesse- Kassel.

Question: What is the date of birth of Princess Wilhelmina Of Hesse-Kassel's father?
Answer: 28 May 1689