In May 1916 Dönitz married Ingeborg Weber, the daughter of a German general. They had three children, Ursula, born in 1917, Klaus, born in 1920, and Peter, born in 1922.^[15] Both of Dönitz's sons died during World War II. His younger son, Peter, was a watch officer on U-954 and was killed on 19 May 1943, when his boat was sunk in the North Atlantic with the loss of its entire crew. After this loss, the older brother, Klaus, was allowed to leave combat duty and began studying to be a naval