Andrew, Duke of Calabria
Andrew, Duke of Calabria( 30 October 1327 – 18 September 1345) was the first husband of Joanna I of Naples, and a son of Charles I of Hungary and brother of Louis I of Hungary.
Otto, Duke of Brunswick-Grubenhagen
Otto, Duke of Brunswick- Grubenhagen( 1320 – 1 December 1398) was the fourth and last husband of Joanna I of Naples.
He also held the title of Prince of Taranto.
His nickname was Otto the Tarantine.
Baldwin IV, Count of Hainaut
Baldwin IV( 1108 – 8 November 1171) was count of Hainaut from 1120 to his death.
He was the son of Baldwin III, Count of Hainaut, and Yolande de Wassenberg.
Baldwin III, Count of Hainaut
Baldwin III( 1088–1120) was count of Hainaut from 1098 to his death.
He was son of Baldwin II, Count of Hainaut, and Ida of Louvain.
Joanna of Hainaut
Joanna of Hainault (1315–1374) was a Duchess of Jülich by marriage to William V, Duke of Jülich.
She was the third daughter of William I, Count of Hainaut, and Joanna of Valois.
She was a younger sister of Philippa of Hainault, Queen of England, and Margaret II of Hainault.
Reforce d'Agoult
Reforce d' Agoult was the Angevin seneschal of medieval Lombardy, under the reign of Joanna I of Naples.
Killed in battle at Gamenario, he was replaced by Roberto di Luinardo.
Robert W. Levering
Robert Woodrow Levering( October 3, 1914 – August 11, 1989) was a U.S. Representative from Ohio, son-in- law of Usher L. Burdick and brother- in- law of Quentin N. Burdick.
William V, Duke of Jülich
William V, Duke of Jülich (– 25/26 February 1361) was a German nobleman.
Some authors call him William I, because he was the first "Duke of Jülich"; the earlier Williams had been "Count of Jülich".
Other authors call the subject of this article "William VI"; they count the son and co-ruler of William IV as William V.
William V was the eldest son of Gerhard V of Jülich and Elisabeth of Brabant-Aarschot, daughter of Godfrey of Brabant.
William V was a key political figure of his time, being a brother-in-law to both Edward III of England and Emperor Ludwig IV.
He spent enormous sums of money to have his brother Walram of Jülich appointed as Archbishop of Cologne over Adolph II of the Marck.
In 1337 he was crucially involved in the German-English alliance which caused the start of the Hundred Years' War.
William was an important supporter of Emperor Ludwig and for a time, he supported the Habsburgs against the House of Luxembourg in the Carinthian war of succession.
Upon the collapse of the German-English alliance and the death of his brother-in-law, William switched his allegiance to Emperor Charles IV.
In 1352 he initiated an inheritance tax on Heinsberg-Valkenburg/Monschau.
William won important positions through his Archbishop brother and also served for a time as a field captain for Flanders in the Hundred Years' War.
His sons fought against him during an uprising of part of the Jülich knighthood which opposed inclusion in the increasing territorial state, and he was imprisoned by them in 1349, but released in 1351 due to public pressure.
Upon his father's death in 1328, William became Count of Jülich.
In 1336 William was appointed Margrave by his brother-in-law, Emperor Ludwig IV, and in 1356/57 he was raised to the level of Duke by Emperor Charles IV, thus becoming the first Duke of Jülich.
His skillful marriage policy, especially the marriage of his son Gerhard to Margaret of Ravensberg, heiress of Berg and Ravensberg, enabled him to add territory to the house of Jülich.
Upon William's death in 1361, the Duchy of Jülich passed to his second son, William, his eldest son having predeceased.
William and his wife are buried in Nideggen.
He seems to have held the title of Earl of Cambridge from 1340 to his death.
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.
John of Valois, Count of Montpensier
John of Berry( 1375/1376–1397), count of Montpensier( 1386 – 1401), was a French nobleman.
He was the son of John, Duke of Berry, and of Joanna of Armagnac.
He had no children and predeceased his father.
He married twice:

Question: Who is Joanna Of Hainaut's sibling-in-law?
Answer: Walram of Jülich