What are the last names of Reese Malcolme Dooey and Luis on Malcolm in The Middle?

Here are the last names of the main characters you mentioned from "Malcolm in the Middle":

* Reese: Reese Wilkerson

* Malcolm: Malcolm Wilkerson

* Dewey: Dewey Wilkerson

* Lois: Lois Wilkerson (married name)

* Hal: Hal Wilkerson

* Luis: Luis Wilkerson (adopted by Hal and Lois)