I read recently that the sponsors of Roman gladiators were called "editors." I'm not sure I buy that, but it might be true. I haven't been able to confirm it through a second source.
This is from Oxford English Dictionary:
1 a person who is in charge of a newspaper, magazine, or multi-author book.
2 a person who commissions written texts for publication.
3 a person who prepares texts or recorded material for publication or broadcasting.
— DERIVATIVES editorship noun.
— ORIGIN Latin, from "edere" meaning to ‘put out’.
Then, I found this NY Times Article from 1915 that discusses the use of the term in various publications. Interesting.
I want to learn where this word originally comes from.