Bedrockgames
I post in the voice of Christopher Walken
Guys @Alzrius point was that phylactery is largely a term used by Christians and people who aren’t Jewish because the Christian bible was working from Greek. He is saying tefillin is how it usually described in Judaism. So I think his point is, if it had been appropriated from Judaism the word would be Tefillin. But phylactery comes from the Christian bible and reflects Christianity’s understanding of its Judaic roots (Jesus and his disciples were all Jewish and using language about Judaism at the time that was later filtered through Greek and Christian theology). Feel free to correct me if my understanding on your point about this is in error @Alzrius