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.
Guy de Montfort, Count of Nola
Guy de Montfort, Count of Nola( 1244 – 1291) was the son of Simon de Montfort, 6th Earl of Leicester and Eleanor of England.
Richard de Montfichet
Richard de Montfichet( or Richard de Munfichet)( died 1267) was a Magna Carta surety.
He was a landowner in Essex.
Simon I de Montfort
Simon I de Montfort (c. 1025 – 25 September 1087) was a French nobleman.
He was born in Montfort l'Amaury, in the Duchy of Normandy, and became its lord.
He was the son of Amaury I de Montfort and Bertrade.
At his death he was buried about away in Epernon, because it was the site of the fortress he was instrumental in constructing.
John I of Montfort
Jean I de Montfort( ?– 1249, Cyprus), Comte de Montfort from 1241 to 1249, son of Amaury de Montfort, comte de Montfort, and of Béatrice de Bourgogne.
In March 1248 he married Jeanne de Châteaudun, dame de Château- du- Loir, daughter of Geoffroy VI, vicomte de Châteaudun, and of Clémence des Roches.
Their only child was:
Peter de Montfort
Peter de Montfort( or Piers de Montfort)( c. 1205 – 4 August 1265) of Beaudesert Castle was an English magnate, soldier and diplomat.
He is the first person recorded as having presided over Parliament as a" parlour" or" prolocutor", an office now known as Speaker of the House of Commons.
He was one of those elected by the barons to represent them during the constitutional crisis with Henry III in 1258.
He was later a leading supporter of Simon de Montfort, 6th Earl of Leicester, against the King.
Both he and Simon de Montfort were slain at the Battle of Evesham on 4 August 1265.
Richard de Montfort
Richard de Montfort (Montfort l'Amaury, Ile de France, France – 1092), was the son of Simon I de Montfort, Count of Évreux (c. 1025–1087) and Agnès d'Évreux (c. 1030 – c. 1087), daughter of Richard, Count of Évreux.
He succeeded his half brother Amaury II in 1089 as lord of Montfort-l'Amaury.
In November 1092, he was killed in battle.
Orderic Vitalis records that he succeeded his half-brother in 1089 and "was relentless in his attempts to take vengeance on William of Breteuil for Amaury's fate".
He was mortally wounded in an attack on Conches, during the war between Raoul III de Tosny and William, Count of Évreux triggered by the enmity between their wives.
He died without an heir and left Montfort to his brother, Simon II.
He was buried in Épernon, Eure-et-Loir, France.
Simon II de Montfort
Simon II de Montfort( Montfort l' Amaury, Ile de France, France – 25 September 1104) was the son of Simon I de Montfort( c. 1025 – 1087) and Agnès d' Évreux( c. 1030 – c. 1087).
He succeeded his brother Richard de Montfort in 1092 as lord of Montfort- l' Amaury.
In 1098, he had to sustain a siege led by William II Rufus, King of England and guardian of Normandy in the absence of Robert Curthose, gone to crusade, and Simon successfully fought it off.
He died without an heir and left Montfort to his brother, Amaury III.
Guy de Montfort, Lord of Sidon
Guy de Montfort( died 31 January 1228) was the younger son of Simon de Montfort and Amicia, sister of Robert FitzPernel, Earl of Leicester.
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.

Question: Who is Richard De Montfort's paternal grandfather?
Answer: Amaury I de Montfort