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
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
|
| Constantine Augustus I |
1559-1568
|
| Isaac IV |
1568-1591
|
| Lucas I |
1591-1633
|