Trenton Lee Stewart said this quote

So what's your team called? asked Kate, twisting her legs into a pretzel-like configuration, We're called the Winmates because we're inmates who win. Kate looked back and forth at Reynie and Constance, searching their expression for signs of delight. You gave yourselves a name? asked Constance. Now it was Kate's turn to be baffled. You didn't? How can you have a team without a name?