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"The name "Robin Hood" was a general name for an elusive thief, but the stories are based on a real person. The stories were embellished quite a bit over the years - John Little was real but Maid Marion was Made Up.
Robin Hood's grave is still there near Leeds, but the inscription on it is a later addition." (Gunvard)
John Saville of Kirklees was the sheriff of York when Robin was outlawed. His sister was a prioress at Kirkless. It is there at Kirklees where the prioress supposedly bled Robin to death, but that may be a fabrication the same as the grave. A later member of the Saville family bought the priory, I think at the time of the reformation.