Jonathan (died before 1167) was the

count of Tusculum The counts of Tusculum or Tuscolo, 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 antipopes during the 11th century ...

from the death of his father,

Ptolemy II Ptolemy II Philadelphus (, ''Ptolemaîos Philádelphos'', "Ptolemy, sibling-lover"; 309 – 28 January 246 BC) was the pharaoh of Ptolemaic Egypt from 284 to 246 BC. He was the son of Ptolemy I, the Macedonian Greek general of Alexander the G ...

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

Henry V, Holy Roman Emperor Henry V (; probably 11 August 1081 or 1086 – 23 May 1125) 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-ruler by his father, Henry IV, i ...

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

Pope Adrian IV Pope Adrian (or Hadrian) IV (; born Nicholas Breakspear (or Brekespear); 1 September 1159) was head of the Catholic Church and ruler of the Papal States from 4 December 1154 until his death in 1159. Born in England, Adrian IV was the first Pope ...

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 () was the highest and constituting assembly of ancient Rome and its aristocracy. With different powers throughout its existence it lasted from the first days of the city of Rome (traditionally founded in 753 BC) as the Senat ...

, 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 from medieval Rome 12th-century Italian nobility Counts of Tusculum