numeri / arithmoi

[Marcel Frederik Schwarze]

There are some epitaphs in the east of the empire in the 4th century. These are sometimes written in Latin and Greek. Furthermore - and this is much more important - there are the countless short novellae and codices of Justinian. In some Greek texts - in the middle of the text, so to speak - Justinan (or his staff) suddenly use the Latin equivalent.
In addition, it is simply a question of translation. Numerus means "number" - while in Greek Arithmos also means "number" (even today).