William the Bastard
By the strict legal and moral censure of the time, he was indeed a bastard. The loin-fruit of Robert the Magnificent and Herleve of Falaise (she was only the tanner's daughter, but....... ).
His qualification for becoming, "The Bastard," as opposed to merely, a bastard, may have happened at the siege of Domfront:
The story goes that some of the defenders made mock of the humble origins of his mother, either in crude jest or by beating hides. Their problem was that William heard it and took umbrage.
The rest, as we know, is history.........