Kosmas 20 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | VII/VIII |
| Titles | Basilikos spatharios (dignity) |
| Seal Sources | Ebersolt, J. "Sceaux byzantins du Musée de Constantinople", RN 4.18 (1914), pp. 207-243, 377-409 |
Kosmas 20 was a basilikos spatharios; owner of a seal dateable perhaps to the seventh or eighth century: Ebersolt, Sceaux Byzantins, p. 398, no. 507. Obv.: cross. Rev.: Κοσμᾶς βασιλικὸς σπαθάριος.
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