Plethon

The story

1. grc-att · derived fromπλῆθος“multitude, great number”
2. Medieval Greek · borrowed fromΠλήθων
3. English todayPlethon

Borrowed from Medieval Greek Πλήθων (Plḗthōn), adopted by Plethon as a nickname or cognomen from Attic Greek πλῆθος (plêthos, “multitude, great number”) as a classicizing substitute for his surname Γεμιστός (Gemistós), from γεμιστός (gemistós, “filled, stuffed”). The particular form may have been chosen to mirror Πλάτων (Plátōn, “Plato”).