Infanta Beatriz of Spain
Infanta Beatriz of Spain, Princess of Civitella-Cesi ("Doña Beatriz Isabel Federica Alfonsa Eugénie Cristina Maria Teresia Bienvenida Ladislàa de Borbón y Battenberg"; 22 June 1909 – 22 November 2002) was a daughter of King Alfonso XIII of Spain and Victoria Eugenie of Battenberg, wife of Alessandro Torlonia, 5th Prince di Civitella-Cesi.
She was a paternal aunt of King Juan Carlos I.
Augusto Torlonia, 3rd Prince of Civitella Cesi
Don Augusto Torlonia, of the House of Torlonia, was an Italian nobleman and third Prince of Civitella- Cesi.
Augusto inherited the title from his grandfather's younger brother, Alessandro Torlonia, 2nd Prince of Civitella- Cesi.
Augusto was born in Rome on 20 January 1855 and died in Borgo San Donnino on 17 April 1926.
His father was Giulio, 2nd Duke of Poli and Guadagolo, and his mother was Donna Teresa dei Principi Chigi- Albani.
Upon Augusto's death, the title passed to his brother, Marino Torlonia, 4th Prince of Civitella- Cesi.
Alessandro Torlonia, 2nd Prince of Civitella-Cesi
Prince" Don" Alessandro Raffaele Torlonia, Prince of Fucino, Prince of Civitella- Cesi, Duke of Ceri( January 1, 1800 – February 7, 1886) was an Italian nobleman of the House of Torlonia.
titled Duca di Ceri, Prince di Fucino.
He was the son of Giovanni Torlonia, 1st Prince di Civitella- Cesi( 1754- 1829).
Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.
Mary Elsie Moore
Mary Elsie Moore, Princess Civitella- Cesi( October 22, 1889 – December 21, 1941), was an American heiress who married and divorced Italian Prince Don Marino Torlonia, 4th Prince of Civitella- Cesi.
Marco Torlonia, 6th Prince of Civitella-Cesi
"Don" Marco Alfonso Torlonia, 6th Prince of Civitella-Cesi (2 July 1937 – 5 December 2014) was the son of Alessandro Torlonia, 5th Prince of Civitella-Cesi and his wife, Infanta Beatriz of Spain, daughter of King Alfonso XIII of Spain.
He was, therefore, first cousin to King Juan Carlos I of Spain.
He was also an uncle to Princess Sibilla of Luxembourg, daughter of his younger sister, Olimpia.
Marino Torlonia, 4th Prince of Civitella-Cesi
Marino Torlonia( 29 July 1861 – 5 March 1933), 4th Prince of Civitella- Cesi, duke of Poli and Guadagnolo, was an Italian nobleman.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Alessandro Torlonia, 5th Prince of Civitella-Cesi
Don Alessandro Torlonia (7 December 1911 – 1 May/12
May 1986)
was the 5th Prince di Civitella-Cesi.
Born in Rome, Torlonia was the son of Marino Torlonia, 4th Prince di Civitella-Cesi and his American wife, Mary Elsie Moore.
On the death of his father in 1933, he inherited large estates as well as his father's princely and other titles.
He died in the Palazzo Torlonia, Rome, in 1986.

Question: Who is the paternal grandmother of Marco Torlonia, 6Th Prince Of Civitella-Cesi?
Answer: Mary Elsie Moore