Marvin Pierce Bush (born October 22, 1956) is the youngest son of George H. W. Bush and Barbara Pierce, and brother of George W., John (Jeb), Neil and Dorothy. He is named for his maternal grandfather. He and wife Margaret have two adopted children from the Gladney Center in Ft. Worth, Texas: a daughter, Marshall, and a son, Walker. Wikipedia
The definitive Wikipedia entry for Marvin Bush. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Marvin_Bush