Question: Where did Frederick, Prince Of Hohenzollern's father die?
Answer: Sigmaringen

William, Prince of 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. William was an older brother of Ferdinand of Romania. His maternal first cousins included (among others) Carlos I of Portugal, Infante Afonso, Duke of Porto, Frederick Augustus III of Saxony, and Princess Maria Josepha of Saxony