Ioannes 550 | Prosopography of the Byzantine Empire |
| Floruit | VII |
| PmbZ No. | 2850 |
| Seal Sources | Zacos, G. and Veglery, A., Byzantine Lead Seals, vol. I (in 3 parts) (Basel, 1972). |
Ioannes 550 was the owner of a seal dateable to the seventh century: Zacos and Veglery 1160. The text, in the form of two monograms, reads: Βοήθει Ἰωάννου and Ἰωάννου.
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