I think it’s a matter of whether you’re grandparents on the mom’s or the dad’s side. My anecdotal observations seem to show the grandparents on the mom’s side usually get first choice of what they want to be called … at least that was the case for us. (BTW we’re the grandparents on our son’s, i.e., the dad’s side. We got second choice on names. But that’s OK …)
I think it’s a matter of whether you’re grandparents on the mom’s or the dad’s side. My anecdotal observations seem to show the grandparents on the mom’s side usually get first choice of what they want to be called … at least that was the case for us. (BTW we’re the grandparents on our son’s, i.e., the dad’s side. We got second choice on names. But that’s OK …)