Jonas Graymalkin was a mutant. He was in Stryker's Files.
- Canon (1 film)
- X2: X-Men United (Name only)
- In the comics, Jonas Graymalkin was an ancestor of Charles Xavier who was in suspended animation for two centuries, after being buried alive by his own father who had found out he was gay. Night vision, super strength, and invulnerability are Graymalkin's abilities. He also has longevity.