I am not part of this family nor have I done any research as far as the Kwanten family concerned. I just happened to be researching my dutch ancestry and Ryan Kwanten's name popped up on some site saying he was of dutch ancestry. For some reason I decided to read about him on wikipedia. Then being as I love family history, I searched the Kwanten name on here. I found this posting and this is what I can tell you.
Ryan Kwanten is from Sydney, NSW, Australia. His father's name is Eddie Kwanten. His mother's name is Kris. I was thinking maybe Eddie Kwanten is the Edward on your post.
Have a great day, Gina