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.
Infanta Antónia of Portugal
Infanta Antónia of Portugal (or of Braganza; ; "Antónia María Fernanda Micaela Gabriela Rafaela Francisca de Assis
Ana Gonzaga
Silvéria Júlia Augusta de Saxe-Coburgo e Bragança"; 17 February 1845 – 27 December 1913) was a Portuguese "infanta" (princess) of the House of Braganza, daughter of Queen Maria II of Portugal and her King consort Ferdinand II of Portugal.
Through her father, she also held the titles of Princess of Saxe-Coburg and Gotha and Duchess of Saxony.
Afonso, Prince of Portugal (1526)
Afonso, Prince of Portugal was the first son of king John III of Portugal and his queen, Catherine of Austria.
He was the Prince of Portugal but died in the same year he was born, in 1526.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Manuel, Prince of Portugal (1531–1537)
Manuel, Prince of Portugal( 11 November 1531 – 14 April 1537), was the Prince of Portugal from 1535 to his death in 1537.
He was the fifth child son of king John III of Portugal and Catherine of Austria.
In 1535, his father officially designated him as Prince of Portugal, taking the place of his eldest sister Infanta Maria Manuela.
However, after his premature death at five years old, his younger brother Infante Filipe became the next Prince of Portugal.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Maria II of Portugal
"Dona" Maria II (4 April 1819 – 15 November 1853) "the Educator"  or "the Good Mother" , reigned as Queen of Portugal from 1826 to 1828, and again from 1834 to 1853.
Born in Rio de Janeiro, she was the first child of Emperor Pedro I of Brazil and his first wife, Empress Maria Leopoldina, and thus a member of the House of Braganza.
One of the two surviving children born when Pedro was still heir apparent to Portugal, she inherited Portuguese titles and was placed in the line of succession to the former Portuguese throne, even after becoming a member of the Brazilian Imperial Family, from which she was excluded in 1835 after her definitive ascension to the Portuguese throne.
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.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.

Question: Who is the maternal grandfather of Infanta Antónia Of Portugal?