Guy II Trousseau was lord of Montlhéry

Montlhéry

Montlhéry is a commune in the Essonne department in Île-de-France in northern France. It is located from Paris.Inhabitants of Montlhéry are known as Montlhériens.-History:...

. He was the son of Milo I of Montlhéry

Milo I of Montlhéry

Milo I the Great was lord of Montlhéry from 1095 until his death. He was the son of Guy I of Montlhéry and Hodierna of Gometz.The identify of his first wife is unknown. His second wife was Lithuise, daughter of Stephen, Count of Blois...

 and Lithuise of Blois

Lithuise of Blois

Lithuise of Blois was born in Blois, Centre, Loir-et-Cher, France to Stephen Henry and Adela of Normandy. She is also known as Adela. She was married Milo I of Montlhéry. Their marriage was a result of a treaty negotiated by Lithuise's mother, Adela of Normandy. Milo was to support Adela...

, and the elder brother of Milo II of Montlhéry

Milo II of Montlhéry

Milo II of Montlhéry was lord of Bray and Montlhéry, and viscount of Troyes. He was the son of Milo I the Great and Lithuise of Blois, and younger brother of Guy II of Montlhéry....

. .

Milo had the temperament of a warrior, and went on the First Crusade

First Crusade

The First Crusade was a military expedition by Western Christianity to regain the Holy Lands taken in the Muslim conquest of the Levant, ultimately resulting in the recapture of Jerusalem...

 in 1096. He was one of those who deserted the army during the Siege of Antioch

Siege of Antioch

The Siege of Antioch took place during the First Crusade in 1097 and 1098. The first siege, by the crusaders against the Muslim city, lasted from October 21, 1097, to June 2, 1098. The second siege, against the crusaders who had occupied it, lasted from June 7 to June 28, 1098.-Background:Antioch...

 (along with his grandfather, Stephen, Count of Blois), and did not dare return directly to France, instead returning home by a long detour through Epirus

Epirus

The name Epirus, from the Greek "Ήπειρος" meaning continent may refer to:-Geographical:* Epirus - a historical and geographical region of the southwestern Balkans, straddling modern Greece and Albania...

 and Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

.

He had only one child, a daughter, Elizabeth of Montlhéry. In 1103 Elizabeth married Philip, Count of Mantes and son of Philip I of France

Philip I of France

Philip I , called the Amorous, was King of France from 1060 to his death. His reign, like that of most of the early Direct Capetians, was extraordinarily long for the time...

 and Bertrada de Montfort.