Amaury I de Montfort
Amaury I de Montfort( died) was Lord of Montfort, son of Guillaume de Montfort of Hainaut, the first Lord of Montfort.
The castle of Montfort l'Amaury, of which he started the construction, was completed by his son Simon I de Montfort, who succeeded him as Lord of Montfort.
He married Bertrade, whose origins are unknown.
He and his wife had three children:
John IV, Count of Soissons
John IV( d. before May 1302), son of John III, Count of Soissons, and Marguerite of Montfort, daughter of Amaury VI, Count of Montfort.
Count of Soissons, inherited upon his father ’s death in 1286.
John married Marguerite of Rumigny, daughter of Hugh II of Rumigny and his wife Philippa.
John and Marguerite had two children:
Upon John ’s death in 1302, his son and namesake became count.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Amaury II de Montfort
Amaury II( d. 1089) was the fourth lord of Montfort l'Amaury.
He was the son of Simon I, Lord of Montfort, and Isabel de Broyes.
He succeeded his father and died soon after.
He, in turn, was succeeded by his half brother Richard de Montfort.
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.
Amaury de Montfort (died 1241)
Amaury de Montfort (1192 – 1241) was the son of Simon de Montfort, 5th Earl of Leicester and Alix de Montmorency, and the brother of Simon de Montfort, 6th Earl of Leicester.
Guillaume de Montfort of Hainaut
Guillaume de Montfort, also known as Guillaume of Hainaut, was a French nobleman of the 10th and 11th centuries, the first Lord of Montfort- l' Amaury.
He was succeeded as Lord of Montfort- l' Amaury by his son Amaury I de Montfort.
Beatrice, Countess of Montfort
Beatrice de Montfort, Countess of Montfort -l' Amaury( c. December 1248 /1249 – 9 March 1312) was a ruling sovereign countess of Montfort from 1249 until 1312.
She was also countess of Dreux by marriage to Robert IV of Dreux, Count of Dreux.
She was the ancestor of the Dukes of Brittany from the House of Montfort- Dreux which derived its name from her title.
Alix de Montmorency
Alix de Montmorency (died 24 February 1220/1221) was a French noblewoman.
Her parents were Bouchard V de Montmorency and Laurette, daughter of Baldwin IV, Count of Hainaut and Alice of Namur.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.

Question: Who is the maternal grandfather of Amaury De Montfort (Died 1241)?
Answer: Bouchard V de Montmorency