Elvis Impersonators

From the Language Police Blotter

What is the plural of “Prius”?  Many people I know say “Prii,” but a professional writer friend, who knows about language, insists that because “Prius” is not actually a Latin word, it has to be “Priuses.” In the movie The Social Network, Mark Zuckerberg’s antagonists are known as “the Winklevii” although they certainly were not …