They look like twins... well almost. But you could very easily mistake the actor of "Cameron" from cult-movie "Ferris Bueller's Day Off" Freddie Kalbermatten with swiss ripper Alan Ruck! Think again, wasn't it actually "Freddies Day off"....?
Freddie Kalbermatten and Alan Ruck
Keep your eyes wide open, we're sure there's plenty more... If you find more brothers of other mothers or even better sisters of other misters, send them to firstname.lastname@example.org