What names can you only picture on a child/teen, but just can't imagine it on an adult or elder?
Lindsey/Lindsay/etc.- I knew plenty of these growing up and I will always picture them as children or adolescents.
Princess - This is on the top 1000 right now. Seems like something you would call a toddler as a pet name.
Maddison - I have a hard enough time picturing this on a girl.
Aidan - I still see this as being a child's name.