Dorothy Walker Bush was born on August 18, 1959, in Harris County, Texas. Her father, George H. W. Bush, was 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, was the 43rd President of the United States. Her other four siblings are Pauline Robinson “Robin” Bush, who died of leukemia in 1953; former Florida governor Jeb Bush; Neil Bush; and Marvin Bush. Since she was a child, she has spent summers and holidays at the Bush compound, a sprawling estate in Kennebunkport, Maine.

In 1975, during a visit to Beijing, she became the first person to be publicly baptized in the People’s Republic of China since its government began discouraging foreign religious practices in 1949.

She earned a Bachelor of Arts degree in sociology from Boston College in 1982.

In 1982, Bush married William Heekin LeBlond (b. January 11, 1957). They had two children, Samuel Bush Sam LeBlond (b. 1985) and Nancy Ellis Ellie LeBlond (b. 1988). They divorced in 1990.

In June 1992, she married Robert P. Koch (b. 1960). The wedding took place at Camp David. They have two children, Robert David (b. 1993) and Georgia Gigi Grace (b. 1996). Robert P. Koch was an aide to House Democratic leader Richard Gephardt, and is a lobbyist and president of the Wine Institute. He has a substantial equity interest in Central European Distribution Corp., a company that manufactures and distributes vodka in Poland.

She sponsored the commission of USS George H.W. Bush, her father’s namesake. On January 10, 2009, she gave the first orders to the ship’s company at Norfolk, Virginia.