No, they're German. John is a Jewish name of course.
Point being Trampie , is that if they had a foreign name that's because they were foreign , not because they're Jewish. Jews are not necessarily foreign you see, and many Jews have British surnames.
The famous Corbyn remark was telling Jews that they don't understand British humour or something similar and the suggestion that Jews might change their names to sound British is , ( unintentionally I'm sure), a very similar thing.