Sophia Taub is the daughter of Chris Taub and Rachel Taub. Her half sister is Sophie Taub. Sophia is first seen in the episode The Confession when Taub can't find child care for his kids when House calls him back to work. He has to take both kids along on an environmental scan. In Parents, Rachel and her new boyfriend Phil ask Taub to let them take Sophia to Portland. After fighting with House over the idea, Taub finally refuses.