Bertha, daughter of Lothair II
Bertha (863-8 – March 925 in Lucca) was countess of Arles by marriage to Theobald of Arles, and margravine of Tuccany by marriage to Adalbert II of Tuscany.
She served as regent of Lucca and Tuscany from 915 until 916 during the minority of her son Guy of Tuscany.
She was described as beautiful, spirited, and courageous, and her influence over her spouse was, coupled with ambition, attributed to have involved her husbands in many wars.
She was the second illegitimate daughter of Lothair II, King of Lotharingia, by his concubine Waldrada.
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.
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.
Otto I, Margrave of Meissen
Otto I was the Margrave of Meissen from 1062 until his death in 1067, and the second Margrave of the family of the counts of Weimar and Orlamünde.
He was a younger son of William III of Weimar and Oda, daughter of Thietmar, Margrave of the Saxon Ostmark.
He inherited Orlamünde from his father in 1039 and Weimar from his brother William in 1062.
He was appointed by the Emperor Henry IV to succeed William in Meissen as well.
He became Advocate of the Cathedral of Merseburg in 1066.
He married Adela of Louvain, daughter of Lambert II, Count of Louvain, son of Lambert I of Louvain, before 1060.
She gave him three daughters:
When he died, she remarried to Dedi I of Lusatia, Otto's stepfather.
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.
Anne Denman
Anne Denman( 1587–1661) was born in Olde Hall, Retford, Nottinghamshire.
Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Lambert, Margrave of Tuscany
Lambert (died after 938) was the second son of Adalbert II of Tuscany and Bertha, daughter of Lothair II of Lotharingia.
He succeeded his elder brother, Guy, as count and duke of Lucca and margrave of Tuscany on his death in 928 or 929 without heirs.
In 931, before 17 October, Hugh, King of Italy, disowned and removed Lambert, giving Tuscany and the familial possession of Lucca to his brother Boso.
Hugh was Guy and Lambert's half-brother, as they had the same mother.
When Guy died, Hugh married Guy's widow, Marozia.
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.
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.

Question: Who is the maternal grandmother of Lambert, Margrave Of Tuscany?
Answer: Waldrada