Mechthild of Bavaria
Mechthild of Bavaria (12 July 1532 – 2 November 1565 in Baden-Baden) was a German noblewoman.
She was the daughter of William IV, Duke of Bavaria and his wife Marie.
She was buried in the Stiftskirche at Baden-Baden.
On 17 January 1557 she married Philibert, Margrave of Baden-Baden, and they had the following children:
Mechthild is a German form of Matilde.
Aénor de Châtellerault
Aénor of Châtellerault( also known as" Aénor de Rochefoucauld")
Duchess of Aquitaine( born c. 1103 in Châtellerault, died March 1130 in Talmont) was the mother of Eleanor of Aquitaine, who arguably became the most powerful woman in Europe of her generation.
Aenor was a daughter of Viscount Aimery I, Viscount of Châtellerault and his wife, Dangereuse de L' Isle Bouchard( d. 1151).
Her mother was willingly" abducted" by her future father- in- law, William IX of Aquitaine and became his mistress until his death in 1127.
Aenor married William X of Aquitaine, the son of her mother's lover, in 1121 and had three children with him:
Mary Moss
Mary Moss( 1791 – 3 January 1875) was the mother of William Booth and the second wife of Samuel Booth.
Louis X, Duke of Bavaria
Louis X( German: Ludwig X, Herzog von Bayern),( Grünwald, 18 September 1495 – 22 April 1545 in Landshut) was Duke of Bavaria( 1516 – 1545), together with his older brother William IV, Duke of Bavaria.
His parents were Albert IV and Kunigunde of Austria, a daughter of Emperor Frederick III.
Princess Marie of the Netherlands
Princess Marie of the Netherlands( 5 June 184122 June 1910) was the fourth child and younger daughter of Prince Frederick of the Netherlands and wife of William, 5th Prince of Wied.
She was the mother of William, Prince of Albania.
She was the last surviving grandchild of William I of the Netherlands.
Henry IV, Duke of Mecklenburg
Henry IV, Duke of Mecklenburg( 1417 – 9 March 1477) was from 1422 to 1477 Duke of Mecklenburg.
William IV, Duke of Aquitaine
William IV (937 – 3 February 994), called Fierebras or Fierebrace (meaning "Proud Arm", from the French "Fier-à-bras" or "Fièrebrace", in turn from the Latin "Ferox brachium"), was the Duke of Aquitaine and Count of Poitou from 963 to his retirement in 990.
William's father, William III, abdicated to the abbey of Saint-Cyprien in Poitiers and left the government to Fierebras.
His mother was Gerloc, the daughter of Duke Rollo of Normandy.
His sister was Adelaide, wife of Hugh Capet, the king against whom William later battled for his duchy.
His early reign was characterised by many wars.
He fought frequently against the counts of Anjou, the first time against Geoffrey Greymantle, who had taken Loudun.
In 988, he went to war with the newly elected king of France, Hugh Capet, whom he refused to recognise.
Capet had been granted Aquitaine by King Lothair before the latter had been reconciled to William's father.
Capet renewed his claim on the great duchy and invaded it that year.
A royal army was defeated on the plain of the Loire Valley.
William sheltered the young Louis, the son of Charles, Duke of Lower Lorraine, the last legitimate Carolingian heir.
He opened the palace of Poitiers to him and treated him as royalty, regarding him as the true heir to the French throne.
In 968, he married Emma or Emmeline, daughter of Theobald I of Blois and Luitgarde of Vermandois.
Their marriage was stormy, in part because of William's indulgence in the pursuit of women and, as a hunting aficionado, wild animals.
She banished his paramours, they separated twice for long periods, and finally he retired to a monastery, as his father had done, leaving Emma to rule Aquitaine in the name of their son William until 1004.
Their second son, Ebles, died sometime after 997.
Minamoto no Chikako
She was the mother of Prince Morinaga.
Emma of Blois
Emma of Blois( 950–27 December 1003) was Duchess consort of Aquitaine by marriage to William IV, Duke of Aquitaine.
She ruled Aquitaine as regent for her son, William V, Duke of Aquitaine, from 996 until 1004.
Gerloc
Gerloc (or Geirlaug), baptised in Rouen as Adela (or Adèle) in 912, was the daughter of Rollo, of Normandy, Count of Rouen, and his wife, Poppa of Bayeux.
She was the sister of William I Longsword of Normandy.
In 935, she married William Towhead, the future Count of Poitou and Duke of Aquitaine.
They had two children together before she died on 14 October 962:

Question: What is the place of birth of William Iv, Duke Of Aquitaine's mother?
Answer: Rouen