Stephen often referred to as Stephen of Blois , was a grandson of William the Conqueror

William I of England

William I , also known as William the Conqueror , was the first Norman King of England from Christmas 1066 until his death. He was also Duke of Normandy from 3 July 1035 until his death, under the name William II...

. He was King of England from 1135 to his death, and also the Count of Boulogne

Count of Boulogne

The county of Boulogne was a historical region in the Low Countries. It consisted of a part of the present-day French département of the Pas-de-Calais , in parts of which there is still a Dutch-speaking minority....

 by right of his wife. Stephen's reign was marked by the Anarchy

The Anarchy

The Anarchy or The Nineteen-Year Winter was a period of English history during the reign of King Stephen, which was characterised by civil war and unsettled government...

, a civil war with his cousin and rival, the Empress Matilda

Empress Matilda

Empress Matilda , also known as Matilda of England or Maude, was the daughter and heir of King Henry I of England. Matilda and her younger brother, William Adelin, were the only legitimate children of King Henry to survive to adulthood...

. He was succeeded by Matilda's son, Henry II

Henry II of England

Henry II ruled as King of England , Count of Anjou, Count of Maine, Duke of Normandy, Duke of Aquitaine, Duke of Gascony, Count of Nantes, Lord of Ireland and, at various times, controlled parts of Wales, Scotland and western France. Henry, the great-grandson of William the Conqueror, was the...

, the first of the Angevin

House of Plantagenet

The House of Plantagenet , a branch of the Angevins, was a royal house founded by Geoffrey V of Anjou, father of Henry II of England. Plantagenet kings first ruled the Kingdom of England in the 12th century. Their paternal ancestors originated in the French province of Gâtinais and gained the...

 kings.

Stephen was born in the County of Blois in middle France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

; his father, Count Stephen-Henry

Stephen II, Count of Blois

Stephen II Henry , Count of Blois and Count of Chartres, was the son of Theobald III, count of Blois, and Garsinde du Maine. He married Adela of Normandy, a daughter of William the Conqueror around 1080 in Chartres...

, died while Stephen was still young, and he was brought up by his mother, Adela

Adela of Normandy

Adela of Normandy also known as Adela of Blois and Adela of England was, by marriage, Countess of Blois, Chartres, and Meaux. She was a daughter of William the Conqueror and Matilda of Flanders...

.