Ioannes 421 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | M/L IX |
| PmbZ No. | 3287 |
| Locations | Sicily (officeplace); Sicily |
| Titles | Hypatos (dignity); Protonotarios, Sicily (office) |
| Seal Sources | Zacos, G. and Veglery, A., Byzantine Lead Seals, vol. I (in 3 parts) (Basel, 1972). |
Ioannes 421 was hypatos and protonotarios of Sicily; owner of a seal dateable to the ninth century, possibly, according to Zacos and Veglery, p. 1957, the second half: Zacos and Veglery 2023. The name and titles read: Ἰωάννῃ ὑπάτῳ καὶ πρωτονοταρίῳ Σικελίας.
(Publishable link for this person: )