The Castle Knowe has been referred to as a fortlet or castle hill[REF] and was classed as a motte and bailey in 1974[REF] and records show that a stone rampart was removed in the 1890s for re-use elsewhere [REF].
The place-name elements 'Knowe' and 'Knol' are derived from the Old English 'Cnoll' meaning a small rounded hill, hillock or mound,[REF] sometimes associated with tales of the fairies [REF].