@Aizenz No? Paternity tests only sort of existed in the 1920's with blood type but that wasn't reliable, it could verify if someone wasn't a parent since there are eight main blood types so 1 in 8 chance and to get a certain blood type your parents had certain combinations they could be. Then DNA tests didn't come around until the 80's. So middle ages parent tests were kind of hair and eye color and that's about it, do they look like you basically.
Read Cursed Princess Club, it's finished and fantastic.
thnx for the info btw