The titles need not show that the characters are related all about this is in the articles You see the nature of fiction is that its not necessarily coherent Since this article is not about Malcolm Wilkerson in the first episode of the show Malcolm in the Middle but about the character throughout the show it is indeed inaccurate to use a name for the character that was only used for the pilot episode For the entire rest of the seven season run the characters name was only Malcolm This is not a question of beauty or taste but of plain accuracy A title like Malcolm XXX my appear clumsy but Wilkerson is not an alternative In my opinion If cant build consensus on this between the two of us I suggest asking for additional input at Wikipedia talkNaming conventions since I didnt find anything in the guidelines for a specific case like this although Im fairly sure the fact that the characters name was Wilkerson only during the first of  episodes of the show means that calling the character Wilkerson esp in the title is inaccurate