Ceolwulf, occasionally spelt Ceolwulph, may refer to: Ceolwulf I of Mercia, King of Mercia Ceolwulf II of Mercia, King of Mercia Ceolwulf of Northumbria (Saint Ceolwulf), King of Northumbria Ceolwulf of Wessex, King of Wessex Ceolulfus, Bishop of Lindsey, also known as Ceolwulf