Tonks looked down at the wand pointed at her and snorted. "Kid, if I can't morph then I bet you can't do anything but poke me in the eye with that thing." She might be on a strange island and magicaless, but Tonks was still an Auror and she can use her mad impressive skills to figure things out.
"Remus doesn't have any relatives. Try again." Well, besides his wife. "And I said I was Tonks. Dora Tonks if you want to get picky. You're not getting my full name even if you do poke me."