He succeeded his mother's first cousin, Stephen, in 1154. He was the first Plantagenet king of England. He ruled until 1189 and was succeeded by his son, Richard I.

This is the King of England who had Thomas Beckett, archbishop of Canterbury, murdered in the cathedral at Canterbury.

Reigned 1154-1189. He ruled an empire that stretched from the Tweed to the
Pyrenees. In spite of frequent hostitilties with the French King his own
family and rebellious Barons (culminating in the great revolt of 1173-74) and
his quarrel with Thomas Becket, Henry maintained control over his possessions
until shortly before his death. His judicial and administrative reforms which
increased Royal control and influence at the expense of the Barons were of
great constitutional importance. Introduced trial by Jury. Duke of Normandy.


http://users.LegacyFamilyTree.com/USPresidents/Royalpresidents.htm says he was born on March 5.