In X2, what is Colonel Stryker’s first name?

Colonel Stryker’s first name in X2 is William.

William Stryker is the principal human antagonist of X2, the 2003 sequel commonly known as X2: X-Men United. He is a military scientist who has developed a plan to attack Professor Xavier’s school and exploit Xavier’s telepathic abilities against mutants around the world.

The film connects Stryker personally to Wolverine’s past. Before the events of X2, Stryker oversaw experiments that bonded adamantium to Wolverine’s skeleton and erased much of Logan’s memory. This history explains why Wolverine’s investigation of Stryker becomes central to the story.

Stryker is played by Brian Cox in X2. The character should not be confused with William Stryker’s comic-book portrayals or with the later film version played by Josh Helman in X-Men: Days of Future Past and X-Men: Apocalypse. In every case, the character’s given name remains William.