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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
John of Bohemia
John of Bohemia (10 August 1296 – 26 August 1346), also known as John the Blind, was the Count of Luxembourg from 1313 and King of Bohemia from 1310 and titular King of Poland.
He was the eldest son of the Holy Roman Emperor Henry VII and his wife Margaret of Brabant.
He is well known for having died while fighting in the Battle of Crécy at age 50, after having been blind for a decade.
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).
John I, Duke of Bavaria
John I of Bavaria( 29 November 1329 – 20 December 1340),( German:" Johann I das Kind, Herzog von Niederbayern"), he was the Duke of Lower Bavaria since 1339.
John
I was the son of Henry XIV, Duke of Lower Bavaria, and Margaret of Bohemia.
His maternal grandparents were John I of Bohemia and Elisabeth of Bohemia
Margaret of Brabant
Margaret of Brabant (4 October 1276 – 14 December 1311), was the daughter of John I, Duke of Brabant and Margaret of Flanders.
She was the wife of Count Henry of Luxemburg and after his election as King of Germany in 1308, she became Queen of Germany.
John of Nepomuk
Saint John of Nepomuk( or John Nepomucene)( 1345 – 20 March 1393) is the saint of Bohemia( Czech Republic) who was drowned in the Vltava river at the behest of Wenceslaus, King of the Romans and King of Bohemia.
Later accounts state that he was the confessor of the queen of Bohemia and refused to divulge the secrets of the confessional.
On the basis of this account, John of Nepomuk is considered the first martyr of the Seal of the Confessional, a patron against calumnies and, because of the manner of his death, a protector from floods and drowning.
John Christian Kunkel
John Christian Kunkel (September 18, 1816 – October 14, 1870) was a Whig and Republican member of the U.S. House of Representatives from Pennsylvania.
He was the grandfather of John Crain Kunkel.
Anne of Bohemia, Duchess of Austria
Anne of Bohemia( 27 March 1323 – 3 September 1338), also known as" Anna of Luxembourg", was a daughter of John of Bohemia and his first wife, Elizabeth of Bohemia.
Anne was a member of the House of Luxemburg.

Question: Who is the maternal grandfather of John Of Bohemia?