Simplify the following text for a Grade 5 native English-speaking person.
Original: William II ( c. 1056 â `` 2 August 1100 ) , the third son of William I of England ( William the Conqueror ) , was King of England from 1087 until 1100 , with powers over Normandy , and influence in Scotland .
Simplified: William II of England ( c. 1056 â `` 2 August 1100 ) was the second son of William the Conqueror and Matilda of Flanders . He was King of England from 1087 until 1100 .