Thomas Nexdor is one of Gil and Susan's sons. He is the older brother of Gavin, the younger brother of Nicholas, the nephew of Johnny Test, Sissy Blakely, Jimmy Two Shoes, and Mary Test, the cousin of Kaitlyn Test and Samantha Two Shoes, and the grandson of Hugh Test and Lila Test. He is considered a picky eater and talks back to his parents. He is very loud and aggressive and will pick on Nicholas.

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