Well, then I sort of misunderstood--not knowing Aramaic or Greek trips me up sometimes. Not two versions of the same name, but definitely an Aramaic/Hebrew name and a Greek name. Still, I don't think I'd ever had anyone explain it like that. Makes sense, though.
I wonder who started the conversion story--that Paul changed his name because he was converted. Well, I guess he did, though--it wouldn't have mattered, having an Aramaic/Hebrew name, if he hadn't been converted. Thanks for the details!