Ioannes 431 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | M/L IX |
| PmbZ No. | 3337 |
| Titles | Basilikos protospatharios (dignity); Patrikios (dignity) |
| Seal Sources | Zacos, G. and Veglery, A., Byzantine Lead Seals, vol. I (in 3 parts) (Basel, 1972). |
Ioannes 431 was patrikios and basilikos protospatharios; owner of a seal dateable to the second half of the ninth century: Zacos and Veglery 2040. The name and titles read: Ἰωάννῃ πατρικίῳ καὶ βασιλικῷ πρωτοσπαθαρίῳ.
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