Talk about turning your luck around...<p>Somehow not mentioned in the Wiki page, but <i>Guerrero</i> actually means Warrior in Spanish. So I get the last name comes from him (?), unverifiable of course.<p>EDIT: Several people pointed out that the surname “Guerrero” has existed in Spain long before the 1500s, so my guess about it originating with Gonzalo Guerrero was off. Thanks for the corrections—leaving the rest of my comment for context.