Blazkowicz

Blazkowicz is the name of a family of heroes first appearing in the Commander Keen games, but made famous in Wolfenstein series, and an influence on the development of "Doomguy"/"Doom Marine" from the Doom Series, which according to original Doom developers was a descendant of the Blazkowicz's.

There are essentially two main timelines/universes which the Blazkowicz's exist (not counting "Wolfenstein II (2009) which took Return to Castle Wolfenstein in a different direction). The first is where World War II as won by the Allies, with William's help during the 1940s. The second is where Axis wins the war, and William doesn't fight back until much later.

Both timelines do end up with his grandson being Commander Keen (though he has a different wife, and family in both timelines). Both timelines apparently also lead up to versions of Doom universe (perhaps original Doom/Doom 3 following the classic Wolfenstein universe, while Wolfestein (2016) might take place in the MachineGames universe (though rumors are classic DoomGuy (Doom Slayer) has been crossing over between both universes).

Both timelines

Original ID Universe

 * On Wolfenstein Wiki (Wolfenstein, 1981)
 * Arthur Blazkowicz, son of BJ, father of Billy, became "Arthur Blaze"
 * William Joseph Blazkowicz II became "Billy Blaze" (Commander Keen, 1990)
 * B.J. Blazkowicz (Doom, 1993)
 * Stan Blazkowicz (Doom II RPG, 2010)

MachineGames universe

 * William J. Blazkowicz (I.E. Terror Billy, grandfather of Billy and Billie Blaze)
 * Billy and Billie Blaze (William Joseph Blazkowicz III & Billie Blazkowicz,) (Commander Keen Mobile, upcoming)
 * William J. BLazkowicz