The anthropological phenonmenon is called “the third sex”(you may argue this is a misnoumer, but the argument stands), not trans. Trans, in general, is contained in this larger category, not the inverse. It’s just a fair to call papise Joan trans as it is to baptise her into the mormon faith.
Eununchs have been much more of a constant in human societies than the third sex and have one particular point in common with trans that has never been associated with ‘the third sex’, castration.
Seriously? This does not belong here