Gregory III (died about 1108) was the son of Gregory II. He 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 1058, when his father died. He is usually considered to stand at the fore of the family of the

Colonna The House of Colonna, also known as ''Sciarrillo'' or ''Sciarra'', is an Italian noble family, forming part of the papal nobility. It was powerful in medieval and Renaissance Rome, supplying one pope (Martin V) and many other church and politic ...

. Unlike his father, he did not bear the ducal and senatorial titles, nor any title to Rome, but simply was ''patricius et consul'', (''Comes Tusculanensis, Consul, illustris''). Gregory was succeeded by his eldest son,

Ptolemy I Ptolemy I Soter (; gr, Πτολεμαῖος Σωτήρ, ''Ptolemaîos Sōtḗr'' "Ptolemy the Savior"; c. 367 BC – January 282 BC) was a Macedonian Greek general, historian and companion of Alexander the Great from the Kingdom of Macedo ...

. He had sons named: *

(1099–1129)-(''Consul comes Tusculanus''); *Gregory IV (1109–1128)-(''Iudex Tusculanensis''); *Peter de Columpna (1099–1151) - (

Colonna family The House of Colonna, also known as ''Sciarrillo'' or ''Sciarra'', is an Italian noble family, forming part of the papal nobility. It was powerful in medieval and Renaissance Rome, supplying one pope (Martin V) and many other church and politi ...

); *Egidius (1128–1137); *Iadara (daughter).

Sources

Foundation of Medieval Genealogy: Northern Italy — 21. Counts of Tusculum.
1108 deaths 12th-century Italian nobility Medieval Roman consuls Medieval Roman patricians Year of birth unknown Counts of Tusculum {{Italy-noble-stub