I think with regards to
Peter it would be fine. You don't have to know the person but so long as there are stories to be had that is the important thing imo. It would be a sweet idea. Maybe since you are down to just three you can wait till he is born and just wait and see which one he "feels like" once you hold him.
Please rate my "Names I would use" list if you have a spare moment, feel free to rate other lists too if you want but ik there's a lot, thank you :)
https://www.behindthename.com/pnl/223226/138473