What was the name of XXX mother?
William, Prince of Hohenzollern
William, Prince of Hohenzollern (German: Wilhelm August Karl Joseph Peter Ferdinand Benedikt Fürst von Hohenzollern) (7 March 1864, in Schloss Benrath, near Düsseldorf -- 22 October 1927, in Sigmaringen) was the eldest son of Leopold, Prince of Hohenzollern and Infanta Antónia of Portugal.
Infanta Antónia of Portugal