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.
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.
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.
Princess Alexandrine of Prussia (1915–1980)
Princess Alexandrine Irene of Prussia (7 April 1915 – 2 October 1980) was the eldest daughter and fifth child of Wilhelm, German Crown Prince, and Cecilie of Mecklenburg-Schwerin.
Her grandparents were Wilhelm II, German Emperor and his wife Augusta Victoria of Schleswig-Holstein, and Frederick Francis III of Mecklenburg-Schwerin and Grand Duchess Anastasia Mikhailovna of Russia.
Alexandrine was a member of the House of Hohenzollern.
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.
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.
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 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.
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: Who is Augusta Victoria Of Hohenzollern's paternal grandfather?
Answer: Leopold, Prince of Hohenzollern