Lex ...

Have only seen the few episodes I can find online (youtube and what not), and now I am one of the many trying to find it on DVD (and the right format) -- or even VHS at this point! No luck yet ... 

Anyway ... question ... are we ever given a last name for Lex? Everything written about this show, he is only referred to as "Lex". Was just curious if anyone knew of a last name that was ever tied to him.

JEP