Ada of Holland
Ada of Holland (c. 1163–1205) was the daughter of Floris III, Count of Holland and his wife Ada of Huntingdon.
She was the sister of Dirk VII, Count of Holland and William I, Count of Holland.
In 1176 she married Otto I of Brandenburg, becoming Margravine of Brandenburg until his death in 1184.
This was Otto's second marriage.
He had been married to Judith of Poland.
Otto already had two sons from his marriage to Judith, Otto (who later succeeded his father as Margrave of Brandenburg) in 1149, and Henry (who inherited the Counties of Tangermünde and Gardelegen) in 1150.
Ada and Otto had a son named Albert II who would in time succeeded his half-brother Otto II as Margrave of Brandenburg in 1205.
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.
Floris III, Count of Holland
Floris III of Holland (1141 – August 1, 1190), Count of Holland from 1157 to 1190.
He was a son of Dirk VI and Sophia of Rheineck, heiress of Bentheim.
Ada of Scotland
Ada of Scotland( – after 1206), also known as Ada of Huntingdon, was a member of the Scottish royal house who became Countess of Holland by marriage to Floris III, Count of Holland.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
William I, Count of Holland
William I( c. 1167 – 4 February 1222), Count of Holland from 1203 to 1222.
He was the younger son of Floris III and Ada of Huntingdon.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
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.
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.
Ada van Holland (died 1258)
Ada of Holland( 1208 – June 15, 1258) was a Dutch abbess of Rijnsburg Abbey from 1239.

Question: Who is Ada Of Holland's paternal grandmother?
Answer: Sophia of Rheineck