My family doesn't really do nicknames. I think that it comes from my family's very proper culture (especially by Californian standards) and from my parents' desire to remind us of our Biblical namesakes. I'd been called Pedro occasionally as I grew up, but it never really stuck. "Stevie Wonders" didn't long outlast my brief moment of 4th-grade recess football glory. Everyone I knew called me Peter for my entire childhood.