Ioannes 590 | Prosopography of the Byzantine Empire |
| Floruit | VIII/IX |
| PmbZ No. | 3188 |
| Titles | Silentiarios (both) |
| Seal Sources | Mushmov, N. A., "Sceaux de plomb byzantins conserves dans la collection du Musee National a Sofia", Bulletin de l'Institut Archeologique Bulgare 8 (1934), pp. 331-349 |
Ioannes 590 was silentiarios; owner of a seal dateable to the eighth or ninth century: Mushmov, "Sceaux de plomb", p. 343, no. 29. The name and title read: Ἰωάννῃ σιλεντιαρίῳ.
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