Kevin MacTaggert is the son of Moira MacTaggert.


X2: X-Men United

His name is seen on Stryker's Computer.

X-Men: Apocalypse

He is mentioned by Charles Xavier, who was surprised that Moira had a son.

X2: X-Men United



  • In the comics, Kevin MacTaggert, best known as Proteus and also called Mutant X, was the mutant son of Scottish genetic researcher Moira MacTaggert and politician Joseph MacTaggert. Kevin had reality warping and possession powers and lived most of his life in forced seclusion at his mother’s Muir Island research facility. He was a recurring villain for the X-Men.

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