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.
Baldwin III, Count of Hainaut
Baldwin III( 1088–1120) was count of Hainaut from 1098 to his death.
He was son of Baldwin II, Count of Hainaut, and Ida of Louvain.
Theodora Komnene, Queen of Jerusalem
Theodora Komnene or Comnena( born) was a niece of Byzantine emperor Manuel I Comnenus, and wife of King Baldwin III of Jerusalem.
Baldwin III of Jerusalem
Baldwin III (1130 – 10 February 1163) was King of Jerusalem from 1143 to 1163.
He was the eldest son of Melisende and Fulk of Jerusalem.
He became king while still a child, and was at first overshadowed by his mother Melisende, whom he eventually defeated in a civil war.
During his reign Jerusalem became more closely allied with the Byzantine Empire, and the Second Crusade tried and failed to conquer Damascus.
Baldwin captured the important Egyptian fortress of Ascalon, but also had to deal with the increasing power of Nur ad-Din in Syria.
He died childless and was succeeded by his brother Amalric.
Melisende, Queen of Jerusalem
Melisende (1105 – 11 September 1161) was Queen of Jerusalem from 1131 to 1153, and regent for her son between 1153 and 1161 while he was on campaign.
She was the eldest daughter of King Baldwin II of Jerusalem, and the Armenian princess Morphia of Melitene.
Sibylla, Queen of Jerusalem
Sibylla (French: "Sibylle", c. 1160–1190) was the Countess of Jaffa and Ascalon from 1176 and Queen of Jerusalem from 1186 to 1190.
She was the eldest daughter of Amalric I of Jerusalem and Agnes of Courtenay, sister of Baldwin IV and half-sister of Isabella I of Jerusalem, and mother of Baldwin V of Jerusalem.
Her grandmother Melisende had provided an example of successful rule by a queen regnant earlier in the century.
Baldwin IV, Count of Hainaut
Baldwin IV( 1108 – 8 November 1171) was count of Hainaut from 1120 to his death.
He was the son of Baldwin III, Count of Hainaut, and Yolande de Wassenberg.
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.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.

Question: Who is Baldwin Iii Of Jerusalem's maternal grandmother?
Answer: Morphia of Melitene