For some reason I thought that "poop/poopy" was an Americanism (although I don't know what I thought it was called elsewhere), so that was part of the problem. Poppy is also sometimes used as a term for a father or a grandfather (is that an exclusively American thing?), which doesn't bother me but I could see being protentially problematic for a bearer of the name.
Basically, it's in the top 100 in a bunch of English-speaking countries but it's never been in the top 1000 in America and I've been trying to figure out if there's a reason for that or if it's just irrational neglect.
Thanks for your response!