Frederick XI, Count of Hohenzollern
Friedrich XI, Count of Hohenzollern( died 26 November 1401), nicknamed" Friedrich the Elder" was a German nobleman.
He was a member of the House of Hohenzollern and a ruling Count of Hohenzollern- Hechingen.
Prince Karl Anton of Hohenzollern
Prince Karl Anton of Hohenzollern- Sigmaringen( 1 September 1868 – 21 February 1919) was a member of the Princely House of Hohenzollern- Sigmaringen.
Karl Anton was the third and youngest son of Leopold, Prince of Hohenzollern and his wife Infanta Antónia of Portugal.
Karl Anton's elder brothers were William, Prince of Hohenzollern and Ferdinand I of Romania.
Prince Adalbert of Prussia (1884–1948)
Prince Adalbert of Prussia ("Adalbert Ferdinand Berengar Viktor"; 14 July 1884 – 22 September 1948) was the third son of Wilhelm II, German Emperor by his first wife, Princess Augusta Victoria of Schleswig-Holstein.
Augusta Victoria of Hohenzollern
Princess Augusta Victoria of Hohenzollern (19 August 1890 – 29 August 1966) was the daughter of William, Prince of Hohenzollern and Princess Maria Teresa of Bourbon-Two Sicilies.
In 1913, she married the deposed King Manuel II of Portugal.
After his death, Augusta Victoria married a second time.
She had no children from either marriage.
Karl Friedrich, Prince of Hohenzollern
Karl Friedrich, Prince of Hohenzollern( born 20 April 1952) is the eldest son of the late Friedrich Wilhelm, Prince of Hohenzollern and Princess Margarita of Leiningen.
He became head of the Princely House of Hohenzollern, the Roman Catholic Swabian branch of the dynasty, upon his father's death on 16 September 2010.
Frederick XII, Count of Hohenzollern
Friedrich XII, Count of Hohenzollern, nickname Friedrich the Oettinger( before 1401 – 1443) was a German nobleman.
He was a member of the Swabian branch of the House of Hohenzollern.
His father was Friedrich XI, Count of Hohenzollern; his younger brother and rival was Eitel Friedrich I, Count of Hohenzollern.
Friedrich Wilhelm, Prince of Hohenzollern
Friedrich Wilhelm, Prince of Hohenzollern( 3 February 1924 – 16 September 2010) was the head of the Princely House of Hohenzollern for over 45 years.
Prince Ferfried of Hohenzollern
Ferfried of Hohenzollern( born 14 April 1943) is a member of the princely House of Hohenzollern- Sigmaringen and former champion race car driver.
William, Prince of Hohenzollern
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.
Between 1880 and 1886, William was heir presumptive to the Romanian throne.
On 20 December 1886, he renounced his rights to the throne in favor of his brother Ferdinand.
Mathilde von Keller
Mathilde von Keller( 1853- 1945), was a German courtier and memoir writer.
She served as lady- in- waiting to Empress Augusta Victoria of Schleswig- Holstein from 1881.
She was a favorite of Augusta alongside von Brockdorff and Claire von Gersdorff, and they were referred to as" The three Hallelujah Aunts".
Her memoirs of her life at court have been published.

Question: What is the date of death of Augusta Victoria Of Hohenzollern's father?
Answer: 22 October 1927