| Girolamo I Angeli | |
|---|---|
| Prince of Thessaly | |
| Grand Master of the Constantinian Order of Saint George | |
| Tenure | c. 1570–1591 |
| Predecessor | Andrea Angeli (alone) |
| Successor | Giovanni Andrea I Angeli |
| Born | 1505 |
| Died | 1591 (aged 85–86) |
| Spouse | Ursula Bini |
| Issue | Michele Angeli Leone Angeli Pietro Angeli Andrea Angeli Ursula Angeli |
| House | Angelo Flavio Comneno |
| Father | Pjetër Engjëlli |
| Mother | Lucia Span |
Girolamo I Angeli (Latin: Hieronymus Angelus;[1][2] 1505–1591) was a joint, or rival, Grand Master of the Constantinian Order of Saint George from 1570 to 1591, together with, or against, his brother Andrea and then his nephew Pietro. Girolamo's family, the Angelo Flavio Comneno, claimed descent from the Angelos dynasty of Byzantine emperors, and Girolamo also claimed the title "Prince of Thessaly".