Jonathan (died before 1167) was the

count of Tusculum The counts of Tusculum, also known as the Theophylacti, were a family of secular noblemen from Latium that maintained a powerful position in Rome between the 10th and 12th centuries. Several popes and an antipope during the 11th century came from ...

from the death of his father,

Ptolemy II ; egy, Userkanaenre Meryamun Clayton (2006) p. 208 , predecessor = Ptolemy I , successor = Ptolemy III , horus = ''ḥwnw-ḳni'Khunuqeni''The brave youth , nebty = ''wr-pḥtj'Urpekhti''Great of strength , gol ...

, in 1153 to his own death. His mother was Bertha, illegitimate daughter of

Henry V, Holy Roman Emperor Henry V (german: Heinrich V.; probably 11 August 1081 or 1086 – 23 May 1125, in Utrecht) was King of Germany (from 1099 to 1125) and Holy Roman Emperor (from 1111 to 1125), as the fourth and last ruler of the Salian dynasty. He was made co-ru ...

. He was, by inheritance, an imperial vassal, but

Pope Adrian IV Pope Adrian IV ( la, Adrianus IV; born Nicholas Breakspear (or Brekespear); 1 September 1159, also Hadrian IV), was head of the Catholic Church and ruler of the Papal States from 4 December 1154 to his death in 1159. He is the only Englishman t ...

granted him the papal property (the great fortress) in Tusculum and invested him as a papal vassal as well. He swore homage on 9 July 1155 to the pope ''excepto contra Imperatorem''—"except against the emperor." In turn, he surrendered Montisfortini and Faiola to the papacy. The

Senate of Rome The Roman Senate ( la, Senātus Rōmānus) was a governing and advisory assembly in ancient Rome. It was one of the most enduring institutions in Roman history, being established in the first days of the city of Rome (traditionally founded in ...

, however, refused to ratify the grant of the fortress to the count. In 1163, he was invested with the port of Astura, which his father had illegally held from the church, by the abbot of S. Alessio. At some point during his countship, he must have associated his younger brother Raino with him, for Raino appears as sole count in 1167.

Sources

* Gregorovius, Ferdinand. ''Rome in the Middle Ages Vol. IV Part 1''. 1905.
Lexikon des Mittelalters: ''Gionata Graf von Tusculum''.
1160s births People of medieval Rome 12th-century Italian nobility Counts of Tusculum