My son was born a few weeks ago and we're calling him Zach... BUT we haven't registered his birth yet as we really can't decide whether to just put 'Zach' on the birth certificate or to have a more 'formal' name which he has got the option of using if he wants when he's older. If we do, I can't decide between these (don't really like Zachariah):
Zachary
Zachaby
Zachaeus
Thoughts please!