William I (circa 1028[1] – 9 September 1087), also known as William the Conqueror (in French: Guillaume le Conquérant), was the first Norman King of England from 1066 until 1087. He was also Duke of Normandy from 3 July 1035 until his death, under the name William II. Before his conquest of England, he was known as William the Bastard (Guillaume le Bâtard) because of the illegitimacy of his birth.
Source: http://en.wikipedia.org/wiki/William_the_Conqueror
The Norman conquest of England began on 28 September 1066 with the invasion of England by William, Duke of Normandy. William became known as William the Conqueror after his victory at the Battle of Hastings on 14 October 1066, defeating King Harold II of England. Harold's army had been badly depleted in the English victory at the Battle of Stamford Bridge in Northern England on 25 September 1066 over the army of King Harald III of Norway. By early 1071, William had secured control of most of England, although rebellions and resistance continued until approximately 1088. Source: http://en.wikipedia.org/wiki/Norman_conquest_of_England
Rollo Duke of Normandy, also known as The Bloody Brother, is a play written in collaboration by John Fletcher, Philip Massinger, Ben Jonson, and George Chapman. Scholars have disputed almost everything about the play; but it was probably written sometime in the 1612–24 era and later revised, perhaps in 1630 or after. In addition to the four writers cited above, the names of Nathan Field and Robert Daborne have been connected with the play by individual scholars. Source: http://en.wikipedia.org/wiki/Rollo_Duke_of_Normandy

Richard II (died 1026), called the Good (French: Le Bon), was the eldest son and heir of Richard I the Fearless and Gunnora. Source: http://en.wikipedia.org/wiki/Richard_II,_Duke_of_Normandy