Purely by coincidence, (close) friends of ours have chosen the same second name for their baby as we had decided on for ours. Without going too much into it, we chose the name as a way of getting a reference to my side of the family into the name as the baby will have my DP's surname. The other thing is that I'd put money on the couple in question being massively irritated about us picking the same name as them, regardless of circumstance. What would you do?