Honestly, I really had to think about the connection. I'm 24. I doubt your DD2's friends will have much idea at all about it and if they do? I don't really get the big deal but that might be showing my lack of knowledge around the case... I mean, it is the innocent 9 week old baby, doesn't seem 'negative' to me - regardless if it was dingos or something else or what you know? What damage will the connection do? And as others mentioned, once you name somebody something, the people close to them will have to stretch their minds to think of anyone/thing else past the initial thought. Lots of people share names with lots of people.

The Jayden thing, I had to google and still, have never heard of the story so it does become a generational thing...

I think it is a beautiful name