Board Thread:General Discussion/@comment-22793593-20131109012620/@comment-34242538-20180211222339

Warptoad wrote: Derpwagon wrote: If Garmadon and Chen go by their last name, Wu probably does, too. I mean, think about it: "Garmadon" is obviously not a Chinese-origin name, yet "Wu" is. So, most likely, "Wu" and "Garmadon" are the same (well, actually, "Wu" and "Garmadon" aren't real words, but if you think about it, the origins/laguages clearly don't match), yet with different translations of languages. So, if these facts were to be true, Wu doesn't have a first name. Garmadon and Wu don't have last names. They just go by their first names.

Actually, Garmadon clearly is a last name, since Lloyd's last name is Garmadon. Therefore, taking in his father's last name, Garmadon, that is Lloyd's last name.