Guy (Italian : Guido; born c. 1012) was the duke of Sorrento from 1035, the brother of Guaimar IV of Salerno, father-in-law of William Iron Arm and William of the Principate, and brother-in-law of Humphrey of Hauteville. He was the son of Guaimar III and Gaitelgrima. Guy's place in history is secured primarily through his relations (by blood and marriage), though his own actions were not inconsequential. According to John Julius Norwich, he was a "selfless" prince, exhibiting a "moral sense rare for [his] time and position."
His brother conquered Sorrento in 1035 and bestowed it on him as a duchy. He was a constant supporter of his brother and the Normans during the former's reign and he counted the mercenaries as allies when, upon the assassination of Guaimar, his family, including his nephew, the Salernitan heir, was rounded up by the assassins and imprisoned, he being the only one to escape. He quickly flew to the Normans of Melfi, whom he paid highly for aid. He brought them back with his own Sorrentine army to besiege Salerno, wherein the conspirators had fortified themselves. Guy had soon captured all of the conspirators' families and had negotiated the release of his nephew, Gisulf. Guy accepted their surrender soon after and promised them no harm. The Normans, not bound, they said, by Guy's oath, massacred the four brothers and 36 others, one for each stab wound found in Guaimar's body. Guy enthroned his nephew and he and his Normans, who would have preferred Guy as prince, did immediate homage to him. Nevertheless, Gisulf was thankless to his Norman vassals and grew to be a piratical neighbour to all in Southern Italy. His principality was constantly picked away and he ignored the advice of his uncle Guy counselling moderation.
Guy remained forever loyal to the Hauteville leadership, however. In 1073, he captured the rebel Herman, his own nephew, and handed him over to Robert Guiscard, his nephew-in-law. Guy died amidst the breakup of the great principality his brother had forged and he had preserved. With his death, Sorrento became independent once more.
His children were:
Robert "Guiscard" de Hauteville, sometimes Robert "the Guiscard", was a Norman adventurer remembered for his conquest of southern Italy and Sicily in the 11th century.
William I of Hauteville, known as William Iron Arm, was a Norman adventurer who was the founder of the fortunes of the Hauteville family. One of twelve sons of Tancred of Hauteville, he journeyed to the Mezzogiorno with his younger brother Drogo in the first half of the eleventh century (c.1035), in response to requests for help made by fellow Normans under Rainulf Drengot, count of Aversa.
Drogo of Hauteville was the second Count of Apulia and Calabria (1046–51) in southern Italy. Initially he was only the leader of those Normans in the service of Prince Guaimar IV of Salerno, but after 1047 he was a territorial prince owing fealty directly to the Emperor.
Humphrey of Hauteville, surnamed Abagelard, was the count of Apulia and Calabria from 1051 to his death.
Richard of Salerno, was a participant in the First Crusade and governor of the County of Edessa from 1104 to 1108. He was the cousin of Richard of Hauteville.
Guaimar IV was Prince of Salerno (1027–1052), Duke of Amalfi (1039–1052), Duke of Gaeta (1040–1041), and Prince of Capua (1038–1047) in Southern Italy over the period from 1027 to 1052. He was an important figure in the final phase of Byzantine authority in the Mezzogiorno and the commencement of Norman power. He was, according to Amatus of Montecassino, "more courageous than his father, more generous and more courteous; indeed he possessed all the qualities a layman should have—except that he took an excessive delight in women."
Guaimar III was the Lombard prince of Salerno from around 994 to his death. Under his reign, Salerno entered an era of great splendour. Opulenta Salernum was the inscription on his coins. He made Amalfi, Gaeta and Sorrento his vassals and annexed much of Byzantine Apulia and Calabria.
Richard Drengot was the count of Aversa (1049–1078), prince of Capua and duke of Gaeta (1064–1078).
Gisulf II was the last Lombard prince of Salerno (1052–1077).
Gaitelgrima is a Lombard feminine name.
Geoffrey of Hauteville was a Norman military leader, the second youngest son of Tancred of Hauteville by his first wife Muriella. He joined his brothers in the Mezzogiorno around 1053, arriving with his half-brothers Mauger and William. He was certainly present at the Battle of Civitate in that year.
William of Hauteville was one of the younger sons of Tancred of Hauteville by his second wife Fressenda. He is usually called Willermus instead of Wilelmus in Latin annals and so is often called Guillerm instead of Guillaume in French.
Guaimar II was the Lombard prince of Salerno from 901, when his father retired to a monastery, to his death. His father was Guaimar I and his mother was Itta. He was associated with his father in the principality from 893. He was responsible for the rise of the principality: he restored the princely palace, built the palace church of San Pietro a campanile, and restored gold coinage.
The House of Hauteville was a Norman family originally of seigneurial rank from the Cotentin. The Hautevilles rose to prominence through their part in the Norman conquest of southern Italy. By 1130, one of their members, Roger II, was made the first King of Sicily. His male-line descendants ruled Sicily until 1194. Some Italian Hautevilles took part in the First Crusade and the founding of the Principality of Antioch (1098).
The Principality of Salerno was a medieval Southern Italian state, formed in 851 out of the Principality of Benevento after a decade-long civil war. It was centred on the port city of Salerno. Although it owed allegiance at its foundation to the Carolingian emperor, it was de facto independent throughout its history and alternated its allegiance between the Carolingians and their successors in the West and the Byzantine emperors in the east.
The Principality of Capua was a Lombard state centred on Capua in Southern Italy. Towards the end of the 10th century the Principality reached its apogee, occupying most of the Terra di Lavoro area. It was originally a gastaldate, then a county, within the principality of Salerno.
The Norman conquest of southern Italy lasted from 999 to 1194, involving many battles and independent conquerors.
The County of Apulia and Calabria, later the Duchy of Apulia and Calabria, was a Norman state founded by William of Hauteville in 1043 composed of the territories of Gargano, Capitanata, Apulia, Vulture, and most of Campania. It became a duchy when Robert Guiscard was raised to the rank of duke by Pope Nicholas II in 1059.
Pandulf or Paldolf was the first Lombard lord (dominus) of Capaccio in the Principality of Salerno.
Pandulf III was briefly the Prince of Salerno from around 3 to 10 June 1052. He was the eldest of four brothers of Gemma, wife of Prince Guaimar IV. He seized the throne in a coup d'état, when he and his brother assassinated Guaimar. He reigned for only a week before he was forced to step down and was promptly murdered.