Claim: George H. W. Bush was the 41st President of the United States.

Dorothy Walker Bush Koch , often called `` Doro '' , -LRB- born August 18 , 1959 -RRB- is an American author and philanthropist . She is the daughter of the 41st President of the United States George H. W. Bush and former First Lady Barbara Bush , and the youngest and only female sibling of George W. Bush , the 43rd President .