Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.
He was the grandfather of Emperor Yōzei.
Henry Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
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.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Ada de Warenne
Ada de Warenne (or Adeline de Varenne) (1120 – 1178) was a Scottish princess, the Anglo-Norman wife of Henry of Scotland, Earl of Northumbria and Earl of Huntingdon.
She was the daughter of William de Warenne, 2nd Earl of Surrey by Elizabeth of Vermandois, and a great-granddaughter of Henry I of France.
She became mother to two Kings of Scots, Malcolm the Maiden and William the Lion.
Malcolm IV of Scotland
Malcolm IV (Mediaeval Gaelic: "Máel Coluim mac Eanric"; Modern Gaelic: "
Maol Chaluim mac Eanraig"), nicknamed Virgo, "the Maiden" (between 23 April and 24 May 11419 December 1165) was King of Scotland from 1153 until his death.
He was the eldest son of Henry, Earl of Huntingdon and Northumbria (died 1152) and Ada de Warenne.
The original Malcolm Canmore, a name now associated with his great-grandfather Malcolm III (Máel Coluim mac Donnchada), he succeeded his grandfather David I, and shared David's Anglo-Norman tastes.
Called Malcolm the Maiden by later chroniclers, a name which may incorrectly suggest weakness or effeminacy to modern readers, he was noted for his religious zeal and interest in knighthood and warfare.
For much of his reign he was in poor health and died unmarried at the age of twenty-four.
Prithvipati Shah
Prithvipati Shah( ?–1716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.
He was the grandfather of Nara Bhupal Shah.

Question: Who is the maternal grandfather of Malcolm Iv Of Scotland?
Answer: William de Warenne, 2nd Earl of Surrey