John of Gallura
John (or "Giovanni") Visconti (died 1275) was the Judge of Gallura from 1238 to his death.
He was a member of the Visconti dynasty of Pisa.
John was the son of Ubaldo I Visconti and cousin of Ubaldo of Gallura.
When the latter Ubaldo drew up a will in January 1237 at Silki, John was nominated to succeed him.
However, Enzo, the husband of his Ubaldo's widow Adelasia of Torres, seems to have taken control of both Gallura and Logudoro and was granted the title King of Sardinia by his father, the Emperor Frederick II.
Nevertheless, John was soon in power in Gallura.
In 1254, he joined the Republic of Pisa in her attack on John of Cagliari.
In 1258, the Republic partitioned the Giudicato of Cagliari amongst her supporters.
John annexed a third of it — Ogliastra, Quirra, Sarrabus, and Colostrai — to Gallura.
John subsequently remained mostly on the Italian peninsula, participating in the wars between the Guelphs and the Ghibellines on the side of Pisa.
He returned to the island in 1274, but was back in Pisa the next year, when he died there.
All his possessions passed to the Republic.
He married Dominicata, daughter of Aldobrandino Gualandi-Cortevecchia, but she died in 1259.
He married as his second wife a daughter of Ugolino della Gherardesca, Count of Donoratico.
He was one of Ugolino's few supporters during the factional infighting which plagued Pisa.
His son by Ugolino's daughter, Ugolino, called "Nino", succeeded him.
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Nino Visconti
Ugolino Visconti (died 1298), better known as Nino, was the Giudice of Gallura from 1275 or 1276 to his death.
He was a son of Giovanni Visconti and nephew of Ugolino della Gherardesca.
He was the first husband of Beatrice, daughter of Obizzo II d'Este.
His symbol was a cock.
Nino succeeded his father in Gallura in 1275 or 1276 and spent most of his life alternating time in Pisa and Gallura.
His chaplain, a friar named Gomita, was caught taking bribes to release prisoners and so Nino had him hanged.
Gomita was placed in the eighth circle of Hell in the "Inferno" and Nino was commended for the act of justice and piety.
In 1288, he began to share power with his uncle in Pisa, but the two quarreled.
The elder Ugolino tried to enlist the archbishop Ruggieri degli Ubaldini to expel Nino from the city, but the archbishop instead exiled them both and appointed his own podestà and capitano del popolo.
Then a Pisan army was sent to take control of Nino's giudicato.
The betrayed giudice never set foot in his giudicato again.
Nino's daughter Joanna succeeded to the title of Gallura and married Rizzardo IV da Camino, Count of Ceneda and Lord of Treviso.
Nino was an important patron of literary culture.
Dante Alighieri was a friend, and, in the eighth canto of his "Purgatorio", to his mild surprise, meets Nino in the region of Purgatory outside St. Peter's gate, where the souls of those who neglected their spiritual welfare for the sake of their country are detained for a period equal to their earthly lifetimes before beginning their purgation.
His widow remarried with Galeazzo de’ Visconti of Milan into the Milanese branch of the Visconti.
Complaining his widow does not love him anymore, Nino asks Dante to remind Giovanna, his daughter, to pray for him.
Nino then continues to berate the Milanese and his widow.
Nino was also an acquaintance of several troubadours and at least two Occitan works are addressed to him.
The two are anonymous "coblas" that appear towards the end of an Italian chansonnier of 1310.
One "coblaMand qe iur e non periur" was addressed "al iuge de Galur", that is, Nino, and has sometimes been ascribed to Paolo Lanfranchi da Pistoia.
The "cobla" which appears immediately after it in the chansonnier is also addressed to Nino, but has not been assigned by any scholar to Paolo.
Terramagnino da Pisa, a native of Pisa's peninsular territories, was frequently present in Gallura, where he probably spent most of his adult life.
His "Doctrina de Cort" was addressed to Nino, at whose court it may have been written.
Another Occitan poet with whom Nino had contact was Luchetto Gattilusio, who acquired interests in property in Sardinia and appeared in several documents pertaining to Nino's rule.
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Question: Who is Nino Visconti's paternal grandfather?
Answer: Ubaldo I Visconti