Julia McWilliams is Landshark's sister. She is based entirely on the real-world Julia McWilliams (who later changed her name to Julia Child when she married). She really did work for the OSS developing shark repellant during the war.
I have no idea whether she actually had a brother or not. I am willing to bet that if she did, he did not develop shark-related superpowers.--Dunlaing 13:31, 13 November 2005 (PST)