Yep. I think its just because the name has become somewhat "mainstream" because the celebrity used it.
Hazel is going to rise in popularity now only because
Julia named her daughter that. I think that it even happened with
Ava after
Reese Witherspoon named her daughter. People don't think of these names and then their attention is brought to them. You're probably right about people saying that the names were odd before, but now that a celebrity has named their child that the name becomes more "acceptable". Just my opinion.
Tate