I do think it sounds very dated and makes me think of
Pamela Anderson. I've never heard it pronounced pah-MEE-lah, but where I live, it's often pronounced pah-ME-lah, which I even like a bit better than the English pronunciation.
I really don't like any of the combos.
Pamela Pearl sounds like a porn star. The best is
Pamela Eve or maybe
Pamela Aviva I'd say.
The sibset that fits best is in my opinion
Estella and
Pamela. I'm not even sure why, it just seems the most pleasing.