Totally made the John Dillinger reference before you even mentioned it. I know that you love the name, but I would look for something different. If you absolutely have to have Dillinger in the name, I would keep it as the middle and pick a completely different first name. Or just use Jack Dillon which wouldn't make me think of John Dillinger at all.
Re: What do you think of this boy name?
Jack has long been a nn for John -- President John F. Kennedy went by Jack Kennedy. Jack Dillinger is a giant no go; says gangsta' all the way.
Low progesterone
Baby boy born 01/2016
Currently: NTNP