Adolf of Nassau (1540–1568)
Adolf of Nassau (Dillenburg, 11 July 1540 – Heiligerlee, 23 May 1568) was a count of Nassau, also known as Adolphus of Nassau.
He was the fourth son and sixth child of William I, Count of Nassau-Dillenburg and Juliana of Stolberg.
He was the second youngest brother of William the Silent.
Mary of Avesnes
Marie of Hainaut( 1280–1354) was the daughter of John II, Count of Holland and Philippa of Luxembourg, her brother was William I, Count of Hainaut.
Catherine of Nassau-Dillenburg
Catherine of Nassau- Dillenburg( 29 December 1543 at Dillenburg Castle in Dillenburg – 25 December 1624 in Arnstadt) was a daughter of William I, Count of Nassau- Dillenburg and his second wife, Juliana of Stolberg.
She was a sister of William the Silent.
William, Count of Sully
William the Simple (– c. 1150) was Count of Blois and Count of Chartres from 1102 to 1107, and jure uxoris Count of Sully.
William was the eldest son of Stephen-Henry, Count of Blois and Adela of Normandy, daughter of William the Conqueror.
He was the older brother of Theobald II, Count of Champagne, King Stephen of England and Henry, Bishop of Winchester.
In the absence of male issue to Henry I, William was the eldest legitimate grandson of William the Conqueror.
He would thus have been the principal rival to Henry's daughter Matilda to inherit the throne after Henry's death.
However, he was not considered as a candidate for the English crown.
Several historians have taken the view that he was passed over because of mental deficiency; hence his soubriquet "William the Simple".
Though widely argued, this has never been clearly substantiated.
William was at first groomed to inherit the comital thrones of Blois and Chartres, and was designated count shortly before his father's departure on his second crusade in 1102.
However he was soon removed from wide-ranging comital duties by his mother, because of his erratic behaviour.
He once assaulted and threatened to kill the Bishop of Chartres over a jurisdictional dispute.
So, when her second son Theobald came of age, around 1107, Adela elevated him to the position of count of Blois-Chartres, and forced William to retire to his wife's lands in Sully.
William Busac
William Busac( 1020- 1076), son of William I, Count of Eu, and his wife Lesceline.
Count of Eu, Count of Soissons," de jure uxoris".
William was given the nickname Busac by the medieval chronicler Robert of Torigni.
William appealed to King Henry
I of France, who gave him in marriage Adelaide, the heiress of the county of Soissons.
Adelaide was daughter of Renaud I, Count of Soissons, and Grand Master of the Hotel de France.
William then became Count of Soissons in right of his wife.
William and Adelaide had four children:
His son Renaud became Count of Soissons upon William ’s death, and he was succeeded by his brother John.
Humbert II, Count of Savoy
Umberto II, nicknamed the Fat( 1065, Carignano, Piedmont – 19 October 1103), was Count of Savoy from 1080 until his death in 1103.
He was the son of Amadeus II of Savoy.
He was married to Gisela of Burgundy, daughter of William I, Count of Burgundy, and had 7 children:
Stephen, Count of Blois
Stephen II Henry (in French, "Étienne Henri", in Medieval French, "Estienne Henri"; – 19 May 1102), Count of Blois and Count of Chartres, was the son of Theobald III, count of Blois, and Gersent of Le Mans.
He is numbered Stephen II after Stephen I, Count of Troyes.
In 1089, upon the death of his father, he became the Count of Blois and Chartres, although Theobald had given him the administration of those holdings in 1074.
He was the father of Stephen of England.
Count Stephen was one of the leaders of the First Crusade, leading one of the major armies of the Princes and often writing enthusiastic letters to his wife Adela of Normandy about the crusade's progress.
Stephen was the head of the army council at the Crusaders' siege of Nicaea in 1097.
He returned home in 1098 during the lengthy siege of Antioch, fleeing the battlefield, without having fulfilled his crusading vow to forge a way to Jerusalem.
He was pressured by Adela into making a second pilgrimage, and joined the minor crusade of 1101 in the company of others who had also returned home prematurely.
In 1102, Stephen was killed at the Second Battle of Ramla at the age of fifty-seven.
Magdalena of Nassau-Dillenburg
Magdalena of Nassau- Dillenburg( 15 December 1547 at Dillenburg Castle in Dillenburg – 16 May 1633 in Öhringen) was a daughter of William I, Count of Nassau- Dillenburg and his second wife, Juliana of Stolberg.
Magdalena was a sister of William the Silent.
Elisabeth of Nassau-Dillenburg
Countess Elisabeth of Nassau- Dillenburg( born 25 September 1542 in Dillenburg – died: 18 November 1603 in Dillenburg) was a daughter of William I, Count of Nassau- Dillenburg and Juliana of Stolberg and was one of the sisters of William the Silent.
Theodred II (Bishop of Elmham)
Theodred II was a medieval Bishop of Elmham.
The date of Theodred's consecration unknown, but the date of his death was sometime between 995 and 997.

Question: When did William, Count Of Sully's father die?
Answer: 19 May 1102