After a baby is born, some cultures will not name the child until a certain amount of time has passed. From what I've read, it seems that most of these waiting periods are specified in local religions, but naming a child has significance in non-religious circles, too. For example, the Free Folk who live North of the Wall (in GRR Martin's Song of Ice and Fire) will not name their babies for two years after the child is born. Infants rarely survive that long, especially among the poorer folk, and it's considered bad luck. Makes you get all attached to the wee beast, which makes it harder when it dies.
I take on a similar sort of sentiment when it comes to new hires at my jobs. In the hospitality and retail industries, staff turnover can be quite high. People will take the first job they're offered, and then quit when they get the one they want, or simply quit because they don't end up liking the work. It's hard to get attached to them, because sometimes you can get along with someone quite well right from the off. That's probably my favourite thing about my restaurant job right now, I get along well with most of the staff and a lot of us have become friends. Same thing at the liquor store, even though the staff is smaller, I think that in general, we're all friends, which is pretty awesome.