Ashendon is a small village and civil parish in Buckinghamshire, England. It is about nine miles west of Aylesbury and seven miles north of Thame. The toponym is derived from the Old English for "Hill overgrown with ash trees". The Domesday Book of 1086 records the village as the property of the Grenville family; it was called Assedune. The original name refers to the fact that in Saxon times this area was forested, serving as hunting land for the king. In recent times the manor of Ashendon passed into the hands of the Marquis of Buckingham.