The head of state of Theodorous and the Parathalassias is currently the Prince, but has historically held other titles. The following is a list of such historic heads of state, from the principality's foundation to the modern day.
List
Gothic Dynasty (1328–1705)
Princes (1328–1455)
| Name |
Reign
|
| Demetrius I |
1328–1353
|
| Demetrius II |
1353–1398
|
| Isaac I |
1398–1427
|
| Evangelus I |
1427–1455
|
Emperors (1455-1484)
| Name |
Reign
|
| Isaac II |
1455–1471
|
| Alexander I |
1471–1484
|
Princes (1484–1559)
| Name |
Reign
|
| Alexander II |
1484–1501
|
| Joseph I |
1501–1508
|
| Anastasius I |
1508–1543
|
| Isaac III |
1543–1559
|
Emperors (1559–1633)
| Name |
Reign
|
| C. Augustus I |
1559–1568
|
| Isaac IV |
1568–1591
|
| Lucas I |
1591–1633
|
Princes (1633–1705)
| Name |
Reign
|
| Joseph III |
1633–1651
|
| Joseph IV |
1651–1673
|
| John I |
1673–1705
|
Augustinian Dynasty (1705–1799)
Princes (1705–1774)
| Name |
Reign
|
| Augustus I |
1705–1728
|
| Augustus II |
1728–1769
|
| Cleopatra I |
1769–1774
|
Emperors (1774–1791; disputed)
| Name |
Reign
|
| Cleopatra I |
1774–1791
|
Princes (1791–1799; jointly)
| Name |
Reign
|
| Arsinoe I |
1791–1799
|
Flavian Dynasty (1774-1799)
Princes (1774–1799)
| Name |
Reign
|
| Flavius I |
1774–1788
|
| Evangelus II |
1788–1799
|
Unification Dynasty (1799–1820)
Princes (1799–1820)
| Name |
Reign
|
| Marcus I |
1799–1812
|
| Theodosius I |
1812–1820
|