Conisholme, in the South Riding of Lindsey in Lincolnshire, comes from Old Danish kunung ‘a king’ and Old Norse holmr ‘an island, an inland promontory, raised ground in marsh, a river-meadow’. The name is topographically appropriate, though what king is evoked by it is uncertain. However, the village of Coningsby, also in the South Riding of Lindsey, is recorded in Domesday Book as having been owned by the king.
