Our very close mates had their 2nd child, a baby boy, a few months ago, and to our absolute horror, they called him the same name as our son (a couple of years older)!
I just don't know how to act now with them, it is so awkward when we see them, and if I'm honest, I'm still seething about it! In our company, they call him by a shortened nickname version (which he doesn't respond to, incidentally!) just to distinguish between the two children!!
On top of this, 3 weeks before he was born, we asked what their name options were, and they said they didn't know!
AIBU to have thought that SUCH close friends could have just, I don't know, PICKED ANOTHER NAME!!