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 it's 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 character's 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 can't build consensus on this between the two of us, I suggest asking for additional input at Wikipedia talk:Naming conventions, since I didn't find anything in the guidelines for a specific case like this (although I'm fairly sure the fact that the character's name was "Wilkerson" only during the first of 151 episodes of the show means that calling the character "Wilkerson", esp. in the title, is inaccurate). —''''''