Keith Branigan Kane-Summerfield

 was the son of Bernice Summerfield and Jason Kane in a possible timeline.

Keith bled into existence at several points during Peter Summerfield's youth. Peter thought of him as his friend. The two of them played together in the Braxiatel Collection's museum, where they entered an ancient Martian spaceship. (PROSE: Key)

He travelled back in to rescue his mother when he was 20. He saved her from being killed by Nimmari. He wanted to stop a war that started because of the artefact she had discovered. He was killed right in front of his mother's eyes. (PROSE: Might)