Ok, here is one for you. We debated for a long time between Penelope and Calliope. [Note from Swistle: And chose Penelope: see post and update.] Given the recent name choice of the kardashian baby, we are seriously considering changing the name to Calliope. We are afraid of the follow on effect with kardashian followers... Are we overreacting?
I would not change it. I had a brief feeling of "Oh no!" when I heard the name of the Kardashian/Disick baby (I'm not expecting any more children, but Penelope is still on my favorites list and I prefer that list to stay safe)---and I found that feeling dissipated within days. If I'd answered this when you sent it, I would have been very conflicted about an answer---but even a week and a half later, I feel clear on it: no need to change. The name still belongs to the world.
It helps even more than you used the name before they did: while no doubt many expectant parents are right this minute reconsidering the name Penelope (either suddenly interested in it or suddenly scrambling for a new name), no one could expect you to change a 6-week-old's name (or, if it happens again with another celebrity, a 2-year-old's, a 6-year-old's, or a 10-year-old's name) just because a celebrity coincidentally used the name.
What does everyone else think? Remember, this is not about whether you'd prefer the name Calliope---the name they'd be changing it to is irrelevant. (If it helps, imagine the other name to be one you like equally as well as Penelope.) The question is only about whether Kourtney Kardashian's baby Penelope should cause an already-born-and-named baby to be renamed the parents' second choice. Let's have a poll over to the right. [Poll closed; see results below.]