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.
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:
Rudolf III von Montfort
Rudolf III von Montfort(* between 1260 and 1275; † 27 or 28 March 1334 in Arbon) was bishop of Chur( 1322–1325) and Konstanz( 1322 – 1334).
He was born into the young family of Montfort- Feldkirch of the Swabian noble family of Montfort.
Wilhelm von Montfort
Wilhelm I Count of Montfort( † 11 October 1301) was prince- abbot of Saint Gall from 1281 until 1301.
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.
Philip of Montfort, Lord of Tyre
Philip Ι of Montfort,( d. 17 March 1270, Tyre) was Lord of La Ferté- Alais and Castres- en- Albigeois 1228 – 1270, Lord of Tyre 1246 – 1270, and Lord of Toron aft.
1240 – 1270.
He was the son of Guy of Montfort and Helvis of Ibelin( daughter of Balian of Ibelin).
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.
John IV, Duke of Brittany
John IV the Conqueror KG (in Breton Yann IV, in French Jean IV, and traditionally in English sources both John of Montfort and John V) (1339 – 1 November 1399) was Duke of Brittany and Count of Montfort from 1345 until his death and 7th Earl of Richmond from 1372 until his death.
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.
Simon de Montfort, 5th Earl of Leicester
Simon de Montfort, 5th Earl of Leicester (– 25 June 1218), known as Simon IV (or V) de Montfort and as Simon de Montfort the Elder, was a French nobleman and soldier who took part in the Fourth Crusade (1202–1204) and was a prominent leader of the Albigensian Crusade.
He died at the Siege of Toulouse in 1218.
He was lord of Montfort-l'Amaury in France and Earl of Leicester in England.

Question: Which country Amaury De Montfort (Died 1241)'s father is from?
Answer: French