Ioannes 579 | Prosopography of the Byzantine Empire |
| Floruit | VIII |
| PmbZ No. | 3048 |
| Seal Sources | Laurent, V., Les sceaux byzantins du médaillier Vatican (Vatican City, 1962) |
Ioannes 579 was the owner of a seal dateable to the eighth century: Laurent, Vat. 274. The name reads: Ἰωάννου.
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