Primogenios 1 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | E/M VII |
| Religion | Christian |
| Locations | Grado (N. Italy); Rome; Regium (Bruttium) (residence); Grado (N. Italy) (officeplace); Rome (officeplace); Regium (Bruttium) (birthplace) |
| Occupation | Bishop |
| Titles | Patriarch, Grado (N. Italy) (office); Regionarius, Rome (office) |
| Textual Sources | Origo Civitatum Italiae seu Venetiarum (Chronicon Altinate et Chronicon Gradense), ed. R. Cessi, Fonti per la storia d'Italia 73 (Rome, 1933) (chronicle) |
Primogenios 1 was a native of Regium; he was once a regionarius of the Church at Rome and later became patriarch of Grado, occupying the see for twenty years three months seven days; he is said to have transferred the bodies of the martyrs Hermachoras and Fortunatus from Aquileia to Grado; he was succeeded as patriarch by Maximos 4: Chron. Alt., p. 124 ("
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