I am not really crazy about Dexter, but that is more than likely due to association. The one thing that keeps coming to my mind is the nn “Dex” which sounds like “decks” in English. Honestly, it isn’t a name I would consider for a child – it sounds like a dogs name to me. BUT if YOU love it and YOU wouldn’t mind being named Dexter, then go for it.
What about Dexter James?