Sancho I of Portugal
Sancho I , nicknamed "the Populator" , King of Portugal (Coimbra, 11 November 115426 March 1211)
was the second but only surviving legitimate son and fifth child of Afonso I of Portugal by his wife, Maud of Savoy.
Sancho succeeded his father and was crowned in Coimbra when he was 31 years old on 9 December 1185.
He used the title King of Silves from 1189 until he lost the territory to Almohad control in 1191.
Kaoru Hatoyama
After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama.
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.
Macrina the Elder
Macrina the Elder( before AD 270 –) was the mother of Basil the Elder, and the grandmother of Basil the Great, Gregory of Nyssa, Peter of Sebaste, and Macrina the Younger.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Teresa Lourenço
Teresa Gille Lourenço( Lisbon, 1330 –?), was the lover of King Peter I of Portugal and mother of King John I of Portugal.
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.
Beatrice, Countess of Alburquerque
Beatrice of Portugal was Countess of Alburquerque as the wife of Sancho Alfonso of Alburquerque.
She was the daughter of Peter I of Portugal and his wife Inês de Castro.
Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I: Diana Guardato is the 16th- Great Grandmother of His Royal Highness Albert II of Belgium, 15th- Great Grandmother of His Majesty Juan Carlos
I of Spain, 17th- Great Grandmother of Philippe of Belgium, 14th- Great Grandmother of His Majesty Manuel II of Portugal, 16th- Great Grandmother of Grand Duke Henri, as well as many others.
Peter I, Count of Urgell
Peter I  (February 23, 1187 - June 2, 1258) was the second son of King Sancho I of Portugal and his wife Dulce, infanta of Aragon, and would eventually become
Count of Urgell and Lord of the Balearic Islands.

Question: Who is the paternal grandmother of Peter I, Count Of Urgell?
Answer: Maud of Savoy