Margaret of Bohemia, Duchess of Wroclaw
Margaret of Bohemia( 21 February 1296 – 8 April 1322) was a daughter of Wenceslaus II of Bohemia and his first wife, Judith of Habsburg.
Anne of Bohemia (1290–1313)
Anne of Bohemia( 1290 –1313) was the eldest surviving daughter of Wenceslaus II of Bohemia and Poland and his first wife Judith of Habsburg.
Her siblings included Elisabeth of Bohemia and Wenceslaus III of Bohemia.
Margaret of Bohemia, Queen of Hungary
Margaret of Bohemia (24 May 1335 – 1349, before October), also known as Margaret of Luxembourg, was a Queen consort of Hungary by her marriage to Louis I of Hungary.
She was the second child of Charles IV, Holy Roman Emperor by his first wife Blanche of Valois.
She was a member of the House of Luxembourg.
Sophia of Bavaria
Sophia of Bavaria (1376 – 4 November 1428) was a Queen of Bohemia and the spouse of Wenceslaus, King of Bohemia and King of the Romans.
She was briefly interim regent of Bohemia after the death of Wenceslaus in 1419.
Wilhelmine Amalia of Brunswick-Lüneburg
Wilhelmine Amalia of Brunswick- Lüneburg( 21 April 1673 – 10 April 1742) was Holy Roman Empress, Queen of the Germans, Queen of Hungary, Queen of Bohemia, Archduchess consort of Austria etc. as the spouse of Joseph I, Holy Roman Emperor.
Blanche of Valois
Blanche of Valois (baptised "Marguerite"; 1317–1348) was a Queen consort of Germany and Bohemia by her marriage to King and later Holy Roman Emperor Charles IV.
She was the youngest daughter of Charles of Valois and his third wife Mahaut of Châtillon.
Yolanda of Poland
Yolanda of Poland( also known as Helen; 1235 – 11 June 1298) was the daughter of King Béla IV of Hungary and Maria Laskarina.
She was the sister of Margaret of Hungary and Kinga of Poland( Cunegunda).
One of her paternal aunts was the Franciscan Elizabeth of Hungary.
Margaret of France, Queen of England and Hungary
Margaret of France( 1158 – 18 September 1197) was queen of England by marriage to Henry the Young King, and queen of Hungary and Croatia by marriage to Béla III of Hungary.
Elizabeth of Hungary, Duchess of Bohemia
Elizabeth of Hungary( 1145- 1189), was a Duchess consort of Bohemia, married to Frederick, Duke of Bohemia.
Her parents were King Géza II of Hungary and Euphrosyne of Kiev.
She served as regent of Bohemia twice in the absence of her spouse.
Margaret of Bohemia, Duchess of Bavaria
Margaret of Bohemia( 1313–1341) was the daughter of King John of Bohemia by his first wife Elisabeth of Bohemia( 1292–1330).

Question: Who is Margaret Of Bohemia, Queen Of Hungary's maternal grandfather?
Answer: Charles of Valois