DRAMATIS PERSONAE
KING RICHARD THE SECOND
QUEEN ISABEL, Duchess of York, wife to King Richard
JOHN OF GAUNT, Duke of Lancaster - uncle to the King
EDMUND LANGLEY, Duke of York - uncle to the King
HENRY BOLINGBROKE, Duke of Hereford, son of John of Gaunt, afterwards King Henry IV
DUKE OF AUMERLE, son of the Duke of York
DUCHESS OF GLOUCESTER, widow of Thomas of Woodstock, DUKE OF GLOUCESTER (uncle to King Richard)
THOMAS MOWBRAY, Duke of Norfolk
By the end of the play, Bolingbroke will be crowned  King Henry IV.  His name would technically be Henry Plantagenet (his noble family), but he took the name “Bolingbroke” from the  Lincolnshire castle  where he was born. 
 Henry is depicted as  Richard’s  opposite in a number of aspects: he lacks his sophistication and eloquence, but also his inability to rule: Bolingbroke proves to be a stout man of action. 
 
 Henry Bolingbroke claims the throne in 1399,  via.
Richard II Characters of the Play