Philipp Ferdinand of Limburg-Stirum
Philipp Ferdinand von Limburg Stirum( born 1734, died 1794), Count of Limburg, lord of Styrum, was the fourth reigning count from the branch Limburg- Styrum- Styrum.
He was also heir of Wilhermsdorf in Franconia and of the sovereign Lordship of Oberstein.
He is known for his very extravagant and fastuous lifestyle, which caused his bankruptcy, and for having been the lover of princess Tarakanova.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
Eva Demmerle
Eva Demmerle( born 18 December 1967) is a German historian and writer.
She was political assistant of Otto von Habsburg.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
August Philip of Limburg Stirum
August Philipp Karl of Limburg Stirum( 1721–1797), count of Limburg Stirum and Bronckhorst, was the son of Otto Leopold Count von Limburg Styrum und Bronckhorst, Lord of Gemen and Raesfeld( 1688 – 1754) and Anna Elisabeth countess of Schönborn( 1686 – 1757).
August Philipp was Prince- Bishop of Speyer and sovereign Lord zu Gemen from 1771 till 1797.
Friedrich Wilhelm of Limburg
Friedrich Wilhelm of Limburg- Styrum,( born Jul 1649, died Jul 1722) count of Limburg and Bronckhorst was the son of Otto of Limburg- Styrum.
He married in 1683 Lucia d' Aylva and they had seven children:( possibly)
Hermann Otto I of Limburg-Styrum
Hermann Otto I of Limburg-Styrum, count of Limburg and Bronckhorst, lord of Styrum, Gemen, Wisch and Borculo, and from 1640 to 1644 advocate of the imperial abbey of Vreden, was born in 1592, and died on 17 October 1644.
He was the eldest son of Jobst of Limburg Stirum.
Otto of Limburg
Otto of Limburg-Styrum, (born 1620, died 27 Aug 1679) count of Limburg and Bronckhorst, was the son of Hermann Otto I of Limburg-Styrum.
He married in 1643
Elisabeth Charlotte countess von Dohna (born 1625, died 1691)and
they had eight children:
Rudolf von Delbrück
Martin Friedrich Rudolf von Delbrück (16 April 1817 – 1 February 1903) was a Prussian statesman at the time of Otto von Bismarck.
Christian Otto of Limburg
Christian Otto von Limburg Stirum, count of Limburg Bronkhorst and Stirum( 1694 – 1749), was a member of the House of Limburg- Stirum and the third reigning monarch from the branch of Limburg- Styrum- Styrum.

Question: Who is the paternal grandfather of Otto Of Limburg?
Answer: Jobst of Limburg