In Snowpiercer there were two guys in suits (the one in the blue suit, and the one in the grey suit, one was young and one was old). In the beginning, the one in the blue suit was lying on the guy with the grey suit's shoulder. I was just wondering if they were in a relationship?
This interview with the film's Costume Designer (Catherine George) indicates that two characters; Franco the Elder and Franco the Younger were in fact brothers.
CoF: Was it your intention to make Franco the Elder and Franco the Younger (Vlad Ivanov and Adnan Haskovic?) look like the Guido brothers? I assume in his former life Franco the Elder was definitely an enforcer.
CG: Yes I imagine that he was some kind of enforcer or hit man. He certainly takes a long time to die. I had actually started looking at the images of assassins and brothers and looked at the Kray twins with their history of violence and their style. Director Bong really liked the idea of that violence and style coupled with love for his brother.
and from the movie script (registration required)
Suddenly, a spear flies in from out of nowhere and pierces Arabic Man’s chest. As he falls, another heavy spear flies through the air towards Curtis. At the last moment, Curtis deflects the spear with his axe blade.
Everyone turns and looks in the direction from which the spears came: the Franco Brothers.