Ok, so we want to use a family name and we are thinking of boy names now. We have settled on Isaac Joseph, my question is can we use Zac as a short?

It is by loving and not by being loved that one can come nearest to the soul of another.
-- George MacDonald
Re: Name opinion
You can refer to your kids as whatever nickname you want... I have a friend who named her child Tristan but they have always called him Chaz.
love the name, and I think that's a 100% non-random 'nickname'.
thanks ladies! he would be named after his great grandfathers.
now if its a girl, forget it, NO IDEA
Zac works for sure. and I agree with mresodonnell12