I wouldn't use it. Even if you're only going to see them every couple of months, it could still be awkward. It would be for me anyway.

Dh has a close friend who has a son with the name we liked for a boy, he and his ex are separated and he doesn't get custody of the kids often, so we see his kids even less, but I still couldn't use the name. Luckily we are having a girl

However one of our other close friends is due a week before me and they could possibly use the name we like! If that happens, I will change.