Murad I
Murad I ((nicknamed Hüdavendigâr, from Persian: خداوندگار, "Khodāvandgārthe devotee of God" – but meaning "sovereign" in this context); 29 June 1326 – 15 June 1389) was the Ottoman Sultan from 1362 to 1389.
He was a son of Orhan and the Valide Nilüfer Hatun.
Murad I conquered Adrianople, renamed it to Edirne, and in 1363 made it the new capital of the Ottoman Sultanate.
Then he further expanded the Ottoman realm in Southeast Europe by bringing most of the Balkans under Ottoman rule, and forced the princes of northern Serbia and Bulgaria as well as the Byzantine emperor John V Palaiologos to pay him tribute.
Murad I administratively divided his sultanate into the two provinces of Anatolia (Asia Minor) and Rumelia (the Balkans).
Murad's death against the Serbs would cause the Ottomans to halt their expansion into the territory temporarily and focus their attention once more on the ailing Byzantine Empire.
Prithvipati Shah
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He was the grandfather of Nara Bhupal Shah.
Nefise Hatun
Nefise Hatun  was an Ottoman princess, the daughter of Sultan Murad I of the Ottoman Empire.
She was the wife of Prince Alaattin Ali of Karaman, the ruler of Karamanids, and was the mother of the next Karamanid ruler, Mehmed II of Karaman.
Guillaume Wittouck
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He was the Grandfather of industrialist Paul Wittouck.
Henry Bryant (naturalist)
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He was the grandfather of Henry Bryant Bigelow.
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He was the grandfather of Emperor Yōzei.
Kaya Alp
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John Westley
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He was the grandfather of John Wesley( founder of Methodism).
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Lyon Cohen
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He was the grandfather of singer/ poet Leonard Cohen.

Question: Who is Nefise Hatun's paternal grandfather?
Answer: Orhan