What are some good names from around the Middle Ages?

there are no limmits to the amount before I needextras for other characters that I might use later. It's for a book. ANd does anyone know a fake-religion name I can use for someone who is against monarchy or the actual name, whichever one is fine. And then a disrepsectful way to say it, like Jew is a kind-of disrespectful way to say Jewish accroding to some people Thanks!