Nickname

So I ended up deciding my sons name is Atticus he is 4 months now and everyone now asks what are you going to call him? Apparently Atticus is too long and he needs a nickname but I HATE everything people have come up (cus cus, ti, atty). His middle name is Jackson so have you ladies got any nickname ideas? I kinda thought just calling him his name would be good enough but apparently not and I don’t want people just creating their own nicknames that I can’t stand like the ones that have started.