The thing about IT for older folks is you have to be up for conversation too. Most of the customers I have only get out for church, so if I come out to see them it might be the first conversation they’ve had in days.

By definition? No.

But if there was a situation like that, I’m willing to bet people would default to using the “first” title anyway out of custom.

“First Grandchild” has been used previously (mostly tabloids), but I think the “first” term is usually limited to immediate family