To put this in context, it was FIL's name. MIL, GMIL would be thrilled if we used it.
I don't mind it (although I prefer it as a girl's name, Robyn). I hate any abbreviations of it (like Rob) though.
But part of me thinks it is a bit unlucky (FIL died of cancer in his '50s). Plus, it is the name of dh's boss, and he feels it would be weird going into work and announcing the baby's name both to said boss and to colleagues, given that it is quite unusual.