Like Tuesday, I'd assume her family had converted to Catholicism, or that there was some story behind why her name was
Rivka and not
Rebecca.
I met a young
Rivka recently. Her family were Messianic Jews, but I would have assumed they were just regular Jews if the distinction hadn't been pointed out to me. It's a very, very Jewish name.
I adore the name
Tirzah myself but also wonder what people would think of it being used on a Gentile child!