What is Joey’s fake name friends?

Joey's Alias on Friends

In a current scene, Chandler expresses that he and the others need to view the video, but Ross declines. Meanwhile, Monica and Chandler are still irritated about their new acquaintances, leading Phoebe and Joey to ponder whether these friends might have provided false identities, similar to the times Phoebe goes by “Regina Philange” and Joey refers to himself as “Ken Adams.”