First it was Lily and Molly - people would say they knew a dog with that name, like that's a reason it should never be used on a human 
Now I see the same for some boys names - Toby and Monty, I'm looking at you 
This makes no sense to me. Names take a few years to filter into the public consciousness. I always thought we 'try out' names on our dolls and our pets as children ... and then when we're grown up we get to use the ones we like the most on real live babies! 