I think it must be difficult to stand in the shadows of a famous celebrity sibling, particularly if
people think you are a loser with no talent and that you are trying to glom on to your more famous sibling's success you are trying to make a name in the same industry.
P.S. For the most part, I think there are many reasons why the folks shown above aren't as popular as their famous siblings. But there is one exception: Charlie Murphy. I think he is as funny if not funnier that his famous brother Eddie. FOR REALS. I am also a pretty big fan of Chris Penn, and it sucks that he died so young.