Not that there's anything wrong with the name, at least that I see. I'm just affirming the feedback you got previously. This isn't hypersensitivity; it's simply a cultural difference.
(PS: we chose the name "Matasano" for our software security firm because we gave up on naming and flipped through a list of cool-sounding plant names; turns out, in South America, a "Matasano" is an incompetent doctor.)
The best answer you could have given was, "it's from the name of our favorite Warrant song."