Dorothy Bush Koch
Dorothy Walker Bush Koch, often called Doro, 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 sibling of George W. Bush, the 43rd President.
Dorothy Walker Bush was born on August 18, 1959 in Harris County, Texas. Her father, George H. W. Bush, served as the 41st President of the United States and her mother, Barbara Bush, was the First Lady. She was named after her paternal grandmother, Dorothy Walker Bush. Her brother, George W. Bush, served as the 43rd President of the United States. Her other four siblings are Jeb Bush, Neil Bush, Marvin Bush, and Pauline Robinson Bush, who died of leukemia in 1953. Since she was a child, she has spent summers and holidays at the Bush compound, a sprawling estate in Kennebunkport, Maine.
Source: Wikipedia