Guy (940 – 25 June 965) was the margrave of Ivrea from 950 to his death. In 950, his father, King Berengar II of Italy

Berengar II of Italy

Berengar of Ivrea , sometimes also referred to as Berengar II of Italy, was Margrave of Ivrea and usurper King of Italy from 950 until his deposition in 961, the last before Italy's incorporation into the Holy Roman Empire...

, appointed him to rule in the familial margraviate. His mother was Willa of Tuscany

Willa of Tuscany

Willa, known as Willa of Tuscany , was the daughter of Boso of Tuscany and the wife and queen consort of Berengar II of Italy. She was the mother of Adalbert, Guy, and Conrad....

, his elder brother was Adalbert II, co-king with their father, and their younger brother was Conrad

Conrad of Ivrea

Conrad Cono was the Margrave of Ivrea from 970 to his death. He was the third son of Berengar II of Italy and Willa of Tuscany. His elder brothers were Adalbert and Guy, both of whom ruled the march before him...

.

In 959, Guy sheltered the exiled doge of Venice

Doge of Venice

The Doge of Venice , often mistranslated Duke was the chief magistrate and leader of the Most Serene Republic of Venice for over a thousand years. Doges of Venice were elected for life by the city-state's aristocracy. Commonly the person selected as Doge was the shrewdest elder in the city...

, Pietro III Candiano

Pietro III Candiano

Pietro III Candiano was the Doge of Venice from 942 until 959. In 948 he led a fleet of 33 Galleys to punish the Dalmatian pirates - Narentines - for repeatedly raiding across the Adriatic Sea...

. Guy brought Pietro to his father the king and then the two of them led an expedition against Theobald II, Duke of Spoleto

Theobald II of Spoleto

Theobald II was the Duke of Spoleto and Margrave of Camerino from 953. He was the son of Boniface II of Spoleto and Waldrada. He married a woman also named Waldrada and was the father of Adalbert, Count of Bologna, and possibly of Willa, the wife of Tedald of Canossa.In 959, Berengar and Guy of...

. He captured both Soleto

Soleto

Soleto is a small Griko-speaking city located in the province of Lecce in Apulia, Italy. The town has a total population of 5,537 and is one of the nine towns of Grecìa Salentina.-History:...

 and Camerino

Camerino

Camerino is a small town of 7.135 inhabitants in the Marches , in the province of Macerata, Italy. It is located in the Apennines bordering Umbria, between the valleys of the rivers Potenza and Chienti, about 40 miles from Ancona....

.

In 962, when Adalbert returned from exile in Corsica

Corsica

Corsica is an island in the Mediterranean Sea. It is located west of Italy, southeast of the French mainland, and north of the island of Sardinia....

 to try to reclaim his throne. Guy and Conrad joined with him in besieging Pavia

Pavia

Pavia , the ancient Ticinum, is a town and comune of south-western Lombardy, northern Italy, 35 km south of Milan on the lower Ticino river near its confluence with the Po. It is the capital of the province of Pavia. It has a population of c. 71,000...

, the Italian capital. The brothers then retreated into the fortresses around Lakes Como

Lake Como

Lake Como is a lake of glacial origin in Lombardy, Italy. It has an area of 146 km², making it the third largest lake in Italy, after Lake Garda and Lake Maggiore...

 and Garda

Lake Garda

Lake Garda is the largest lake in Italy. It is located in Northern Italy, about half-way between Brescia and Verona, and between Venice and Milan. Glaciers formed this alpine region at the end of the last ice age...

. His lands were confiscated by the Emperor Otto I and given to Guy, Bishop of Modena. In 965, fighting an army of Swabia

Swabia

Swabia is a cultural, historic and linguistic region in southwestern Germany.-Geography:Like many cultural regions of Europe, Swabia's borders are not clearly defined...

ns under Duke Burchard III

Burchard III, Duke of Swabia

Burchard III was the count of Thurgau and Zürichgau, perhaps of Rhaetia, and then Duke of Swabia from 954 to his death....

, Guy was killed, in a battle on the Po

Po River

The Po |Ligurian]]: Bodincus or Bodencus) is a river that flows either or – considering the length of the Maira, a right bank tributary – eastward across northern Italy, from a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face...

 coming to his brother's rescue. Adalbert escaped to France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

.