Konstancja Lubomirska
Princess Konstancja Lubomirska( ca. 1618–1646) was a Polish noble lady.
Konstancja married Kazimierz Franciszek Czarnkowski on 1 February 1637 in Kraków.
She was the mother of Adam Uriel Czarnkowski, grandmother of Zofia Anna Czarnkowska, Great- grandmother of Katarzyna Opalinska and the great- great- grandmother of Maria Leszczyńska.
Cosimo II de' Medici, Grand Duke of Tuscany
Cosimo II de' Medici (12 May 1590 – 28 February 1621) was Grand Duke of Tuscany from 1609 until his death.
He was the elder son of Ferdinando
I de' Medici, Grand Duke of Tuscany, and Christina of Lorraine.
For the majority of his twelve-year reign, he delegated the administration of Tuscany to his ministers.
He is best remembered as the patron of Galileo Galilei, his childhood tutor.
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.
Giovanni di Bicci de' Medici
Giovanni di Bicci de' Medici( c. 1360 – February 1429) was an Italian banker and founder of the Medici Bank.
While other members of the Medici family, such as Chiarissimo di Giambuono de' Medici, who served in the Signoria of Florence in 1201, and Salvestro de' Medici, who was implicated in the Ciompi Revolt of 1378, are of historical interest, it was Giovanni's founding of the family bank that truly initiated the family's rise to power in Florence.
He was the father of Cosimo de' Medici and Lorenzo de' Medici, and an ancestor of other notable Medici rulers.
For example, he was the grandfather of Piero di Cosimo de' Medici; the great- grandfather of Lorenzo de' Medici( the Magnificent); and the great- great- great- grandfather of Cosimo I de' Medici, Grand Duke of Tuscany.
Maria Cristina de' Medici
Maria Cristina de 'Medici (24 August 1609 - 9 August 1632) was a Tuscan princess and the first born child of Cosimo II de' Medici, Grand Duke of Tuscany.
Nannina de' Medici
Nannina de' Medici( 14 February 1448 – 14 May 1493), born Lucrezia de' Medici, was the second daughter of Piero di Cosimo de' Medici and Lucrezia Tornabuoni.
She was thus the elder sister of Lorenzo de' Medici.
She married Bernardo Rucellai.
Her father's name was Piero, so she is sometimes known as Lucrezia di Piero de' Medici.
Ana Cristina Oliveira
Ana Cristina de Oliveira( born 24 July 1973) is a Portuguese model and actress.
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.
Maria Cristina de Oliveira
Maria Cristina de Oliveira( born 29 August 1959) is a Brazilian chess player who holds the title of Woman International Master( WIM, 1977).
She is a two- time Brazilian Women's Chess Champion( 1975, 1986).

Question: Who is Maria Cristina De' Medici's paternal grandmother?
Answer: Christina of Lorraine