14Tom Cruise and William Mapother
If you were ever a fan of ABC's Lost, you might remember the creepy antagonist from the first season, Ethan Rom. William Mapother, who played Ethan, didn't last very long on the show. However, he has done quite a few movies, starring in five alongside
fellow actor and first cousin, Tom Cruise.
Cruise and Mapother also mirror each other in the fact that they both share their father's name, Tom - actually being Thomas Cruise Mapother IV and William being the son of William Mapother Sr. William undoubtedly has an impressive acting resume, however, these two are another great example of an acting family relationship that 'outshine' each other, with Tom Cruise being one of the most popular actors in Hollywood.