Barbara Pierce Bush (born November 25, 1981) is an American activist. She co-founded and is the chair of the board of the nonprofit organization Global Health Corps. She and her fraternal twin sister, Jenna, are the daughters of the forty-third U.S. president, George W. Bush, and former first lady Laura Bush. She is also a granddaughter of former president George H. W. Bush and former first lady Barbara Bush, after whom she is named. ()