When Prinz Welf Heinrich von Hannover was born on 11 March 1923, in Gmunden, Upper Austria, Austria, his father, Herzog Ernst August III zu Braunschweig Lüneburg, was 35 and his mother, Princess Victoria Louise, of Prussia Victoria Louise Adelaide Matilda Charlotte Hohenzollern, was 30. He married Prinzessin Alexandra zu Ysenburg Büdingen on 21 September 1960, in Kreis Büdingen, People's State of Hesse, Germany. He died on 12 July 1997, in Frankfurt, Hesse, Germany, at the age of 74, and was buried in Main-Kinzig-Kreis, Hesse, Germany.