Pill bug when I was a kid in SoCal so that's what stuck with me. The girls call them Roly Poly bugs, from the Midwest and PacNW. I've also heard potato bugs in the Midwest.
Used roly poly and pill bug interchangeably as a kid. Now I would just call it a roly poly. Kentucky.
And trying to type it - I don't feel like I can spell it correctly no matter what. I've changed the spelling a couple times, and none of them feel right. Saying it sounds fine - spelling it does not. Weird.