Board Thread:Questions and Answers/@comment-25374078-20140829175333/@comment-24882645-20140830033358

I always thought that Mordecai would have the same last name as the creator of Regular Show himself, but you never know. It is kind of ironic how the term jay comes into play, though. I actually never really even considered that the word jay relates to both characters. Although it could be coincidental, it could have been done intentionally as well. This is definitely an interesting theory. Hopefully we'll find out Mordecai's last name in the future, considering that we already know the last names of a fair amount of secondary characters.