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. The title character is the historical Viking duke of Normandy, Rollo (lived 846 – c. 931). 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: Wikipedia (en)