Prince Frederick of Württemberg
Prince" Frederick" Charles Augustus of Württemberg( 21 February 1808 – 9 May 1870) was a General in the Army of Württemberg and the father of William II of Württemberg.
Frederick was a member of the Royal Family of Württemberg and a Prince of Württemberg.
Barbara of Hesse
Barbara of Hesse, Duchess of Württemberg-Mömpelgard (8 April 1536 – 8 June 1597) was a German noblewoman, and the wife of Count George I of Württemberg-Mömpelgard.
Her second husband was Daniel, Count of Waldeck.
Duke Eugen of Württemberg (1758–1822)
Duke Eugen of Württemberg( 21 November 1758 – 20 June 1822) was a German prince.
He was the brother of Frederick I of Württemberg
Christoph, Duke of Württemberg
Christoph of Württemberg, Duke of Württemberg (12 May 1515 – 28 December 1568) ruled as Duke of Württemberg from 1550 until his death in 1568.
Frederick II Eugene, Duke of Württemberg
Friedrich Eugen, Duke of Württemberg( 21 January 1732 – 23 December 1797) was the fourth son of Karl Alexander, Duke of Württemberg, and Princess Maria Augusta of Thurn and Taxis( 11 August 1706 – 1 February 1756).
He was born in Stuttgart.
From 1795 until 1797 he was Duke of Württemberg.
Duke Alexander of Württemberg (1771–1833)
Duke Alexander of Württemberg
(Mömpelgard/Montbéliard, then Württemberg (now France), 5 May 1771 – Gotha, Thuringia, Germany, 4 July 1833) was a Duke of Württemberg.
The son of Frederick II Eugene, Duke of Württemberg and of Sophia Dorothea of Brandenburg-Schwedt.
His sister Sophie Dorothea married Tsar Paul I of Russia.
Duchess Frederica of Württemberg
Duchess Frederica of Württemberg( 27 July 1765 – 24 November 1785) was a daughter of Frederick II Eugene, Duke of Württemberg and Friederike Dorothea of Brandenburg- Schwedt.
Frederick Augustus, Duke of Württemberg-Neuenstadt
Frederick Augustus of Württemberg-Neuenstadt (Neuenstadt am Kocher, 12 March 1654 – 6 August 1716 in Gochsheim) was Duke of Württemberg and second Duke of Württemberg-Neuenstadt.
Eberhard III, Duke of Württemberg
Eberhard III, Duke of Württemberg( 16 December 1614 in Stuttgart – 2 July 1674 in Stuttgart) ruled as Duke of Württemberg from 1628 until his death in 1674.
Eberhard III became the heir under guardianship in 1628 during the Thirty Years'
War at the age of 14 after the death of his father, Johann Frederick, 7th Duke of Württemberg.
His guardian at first was his father's brother Louis Frederick, Duke of Württemberg- Montbéliard and after his death in 1631 Julius Frederick, Duke of Württemberg- Weiltingen.
Württemberg lost around one third of its territory in 1629.
Julius Frederick was removed as guardian in 1633 when Eberhard was declared of full age at which point he assumed full rule of the Duchy.
Following a major defeat of Württemberg troops in the battle of Nördlingen on 6 September 1634, Württemberg was severely looted and plundered.
Eberhard fled to Strasbourg where he married in 1637, returning to Württemberg in 1638 after long negotiations with Ferdinand III of the Holy Roman Empire.
By this time many territories had already been passed on by the Emperor to other parties to push forward Catholicism in the region.
The Duchy of Württemberg was reinstated after long negotiations resulting in the Peace of Westphalia of 1648, despite or maybe because of the effects of war, poverty, hunger and the Bubonic plague all of which reduced the population from 350,000 in 1618 to 120,000 in 1648.
Eberhard III entered into an inheritance agreement with his younger brother Frederick thereby handing over ownership of the Duchy of Württemberg- Neuenstadt and thus establishing a new branch line of the duchy.
In 1651, Eberhard came to a similar agreement with another brother, Ulrich affecting the Castle of Neuenbürg.
Frederick I, Duke of Württemberg
Friedrich I of Württemberg (19 August 1557, in Montbéliard – 29 January 1608, in Stuttgart) was the son of George of Mömpelgard and his wife Barbara of Hesse, daughter of Philip I, Landgrave of Hesse.
Several references are made to him in Shakespeare's "The Merry Wives of Windsor", in which a series of anti-German jokes start with a horse theft, several references are made to German travellers in England and to a German duke who is "not" expected to come to Windsor.
Frederick of Mömpelgard was heir apparent to the dukedom of Württemberg when he visited Windsor and other English cities in 1592.
He developed a desire to be made a Knight of the Garter and solicited Queen Elizabeth for the honor repeatedly.
After he had inherited the dukedom and become more prominent in affairs, she admitted him to the order.
In a calculated slight, he was not informed of his admission in time to attend the investiture in spring 1597, the ceremony for which "The Merry Wives of Windsor" was written.
Thus references to Mömpelgard's earlier visit and his "not" being in Windsor were jokes intended for the play's first audience, and appear in the First Folio edition of the play, taken from the first private performance, but not in the 1602 Quarto derived from public theatrical production.
In May 1604 King James I sent William Dethick to invest Frederick in the order, and he presented jewels including two garters with diamonds and rubies, and two St Georges with diamonds and rubies, and a gold chain or collar, made by the London goldsmiths, John Spilman and William Herrick.
In 1599, Frederick I issued an order that a new town should be established at the northern extremity of the Black Forest by the name of Freudenstadt.
The aim was for the town to become the new residence of the Duchy of Württemberg as it was closer to Mömpelgard than the Württemberg capital Stuttgart.
However, Frederick I died in 1608 and his plans never came to fruition.
The sons of Frederick
I established the ducal house of Württemberg-Neuenstadt, a branch line of the House of Württemberg after a "Fürstbrüderlicher Vergleich" — a mutual agreement made between ducal brothers on 7 June 1617.
The eldest son, Johann Friedrich, assumed barony over the Duchy of Württemberg while the second youngest son, Frederick Achilles, was bequeathed Neuenstadt Castle and an annual endowment of 10,000 guilder.

Question: What is the date of birth of Frederick I, Duke Of Württemberg's mother?
Answer: 8 April 1536