Context : Alexandra Prinzessin von Hannover (née Alexandra Sophie Cecilie Anna Maria Friederike Benigna Dorothea Prinzessin zu Ysenburg und Büdingen; 23 October 1937 -- 1 June 2015) was a German politician, philanthropist, and wife of Prince Welf Henry of Hanover. 
Question : What is Alexandra Prinzessin von Hannover's spouse's name?
Prince Welf Henry of Hanover