For all intents and purposes, Galen Marek looked to be blown up in sacrificing himself so the founding rebels of the Alliance could escape from Emperor Palpatine/ Darth Siddious. However, The Force...
I'm guessing you got a letter from a lawyer saying that he has left you a large inheritance.I got one too, so back off buddy. (But my dead 2004 Tsunami relative was named Marek MyLastName.