Stewart Gilligan Griffin (スチュアート・ギリガン・グリフィン, Suchuāto Girigan Gurifin), a.k.a. "Stewie" (スチューウィー, Suchūwī) is a one-year-old scientist and genius who plans to use his inventions to help people. He is the son of Peter Griffin and Lois Pewterschmidt Griffin. He is also the youngest of three siblings, as his older sister is named Meg and older brother is named Chris. He also has two dogs: a White Lab named Brian, and his son who appears to be a cross between a German Shepard and an Italian Greyhound (though is one sixteenth cat) named Vinny, who were both robot dogs during their debut in Flame Icejin: The New Frontier.