Roger Borsa
Roger Borsa (1060/61 – 22 February 1111) was the Norman Duke of Apulia and Calabria and effective ruler of southern Italy from 1085 until his death.
He was the son of Robert Guiscard, the conqueror of southern Italy and Sicily; Roger was not as adept as his father, and most of his reign was spent in feudal anarchy.
Roger was the son of Robert Guiscard and Sikelgaita, an imposing warrior Lombard noblewoman.
His ambitious mother arranged for Roger to succeed his father in place of Robert Guiscard's eldest son by another wife, Bohemund of Taranto.
According to English historian John Julius Norwich, his nickname came from "his early-ingrained habit of counting and recounting his money."
In 1073, Sichelgaita had Roger proclaimed heir after Guiscard fell ill at Trani.
Roger's cousin Abelard was the only baron to dissent from the election of Roger, claiming that he was the rightful heir to the duchy.
Roger accompanied his father on a campaign to Greece in 1084.
He was still in Greece when his father died on 17 July 1085 in Kefalonia.
While Bohemond was supposed to inherit the Greek possessions and Roger the Italian ones, it was Bohemund who was in Italy (Salerno) and Roger in Greece (Bundicia) at the time of the Guiscard's passing.
Roger rejoined his mother on Cephalonia, his absence causing panic and confusion with his army, according to Goffredo Malaterra.
The two quickly returned to the peninsula and with the support of Roger I of Sicily, his uncle, was recognised as duke in September.
His Lombard heritage also made him a more attractive candidate than his Norman half-brother, who had fled to Capua.
With the support of Jordan I of Capua, Bohemund rebelled against his brother and took Oria, Otranto, and Taranto.
Roger, however, made peace in March 1086 and the brothers acted as effective co-rulers.
In late Summer 1087, Bohemond renewed the war with the support of some of his brother's vassals.
He surprised and defeated Roger at Fragneto and retook Taranto.
Though described as a powerful warrior (he took the cities of Benevento, Canosa, Capua, and Lucera by siege), Roger Borsa was never able to check Bohemund's power or bring him under his control.
The war was finally resolved by the mediation of Pope Urban II and the award of Taranto and other possessions to Bohemund.
Roger also granted him Cosenza and other holdings he desired allodially.
In 1089 Roger Borsa was officially invested with the duchy of Apulia by Pope Urban II.
Roger permitted the minting of baronial coinage in at least two instances (Fulco of Basacers and Manso "vicedux").
He planned to urbanise the Mezzogiorno by granting charters to various towns and encouraging urban planning.
In 1090, he and Urban encouraged Bruno of Cologne, founder of the Carthusian Order to accept election to the archbishopric of Reggio di Calabria.
In May 1098, at the request of his first cousin once removed, Prince Richard II of Capua, Borsa and his uncle Count Roger
I of Sicily began the siege of Capua, from which the prince had long ago been exiled as a minor.
In exchange for his assistance, the duke received the homage of Richard, though he seems to have made no use of it, for Richard's successors paid no heed to Roger Borsa's overlordship.
Capua fell after forty days of notable besieging, for Pope Urban II had come to meet Roger of Sicily and Archbishop Anselm of Canterbury had come to meet the pope.
In October 1104, Roger besieged William, Count of Monte Sant'Angelo, who was at that time independent and pledged to the Byzantines, and expelled him from the Gargano, abolishing the county.
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When his father, who up to that time ruled as sovereign prince, proclaimed himself king in 1815, he became Prince of Orange as heir apparent of the Kingdom of the Netherlands.
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William II, Duke of Apulia
William II (1095 – July 1127) was the Duke of Apulia and Calabria from 1111 to 1127.
He was the son and successor of Roger Borsa.
His mother, Adela of Flanders, had previously been queen of Denmark, and he was a half-brother of Charles the Good.
He succeeded his father as duke in 1111, though Adela served as regent until William was of age.
Like father, like son: he proved utterly inept at governing his Italian possessions.
He could not avoid conflict with his first cousin once removed Roger II of Sicily, and in 1121 Pope Calixtus II personally intervened to make peace between the warring cousins.
William and Roger came to an agreement, whereby Roger provided knights to help William quash a revolt of the minor baron Jordan of Ariano, and in exchange, William abandoned his Sicilian and Calabrian lands.
In 1114, William married a daughter of Count Robert of Carazzo, but they had no children.
He died without legitimate posterity in July 1127, leaving the entire of the Norman Mezzogiorno to his first cousin once removed, Roger II of Sicily, his erstwhile ally.
Generally considered an insignificant ruler by modern historians, William was respected by his contemporaries, popular with his barons and subjects, and praised for his martial prowess.
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Frederick William II was the eldest son of Duke Frederick Louis( 1653 – 1728) and his wife Louise Charlotte of Schleswig- Holstein- Sonderburg- Augustenburg( 1658 – 1740).
His siblings included Dorothea, Peter August, Charles Louis.
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After his death, he was succeeded by his son Frederick William III, who fell in battle in 1757.
The title was then inherited by Frederick William II's brother, Charles Louis.

Question: Where did William Ii, Duke Of Apulia's father die?
Answer: Salerno