Historical evidence points to Robin Hood having come from Yorskire. He's said to be buried at Kirkleees Priory in West Yorks - I think! - and Loxley is in south Yorkshire - hence Robin of Loxley. Donaster is also in Yorkshire, so I think perhaps the link stems from the above information.
Sherwood Forest, although now being in Notts, covered a vast area - perhaps up to south Yorks. Most of the story appears to be fable, as it's argued that if the man ever lived at all, he could've simply been a yeoman, and not Lord of the Manor.