Definition of haydon:
(n) :
A place in England:
(n) :
A civil parish in southern Northumberland, see Haydon Bridge.
(n) :
A hamlet and civil parish (without a council) in north-west Dorset (OS grid ref ST6715).
(n) :
A suburb in Haydon Wick parish, Swindon borough, Wiltshire (OS grid ref SU1288).
(n) :
A village in Radstock parish, Bath and North East Somerset, Somerset (OS grid ref ST6853).
(n) :
A hamlet in Stoke St Mary parish, Somerset, previously in Somerset West and Taunton district (OS grid ref ST2523).