Elf-Rib as depicted by Isaac Vincentsz van der Vinne, 1730.
The Elf-rib (also known as the Tientoner) from the north part of Holland, is a water demon commonly thought to have the appearance of a dog. It is believed he is the lingering spirit of king Radboud from Westfriesland, who's known for his refusal to be baptised. Living in wells and ditches, the Elf-Rib was a Child Terror who could be heard late at night, barking in the distance. Children who found themselves outside at night were likely to be whisked away by the Elf-rib. Likewise, children who found themselves close to the waterside have been said to never return. The Elf-rib has been portrayed in one of the works of artist Isaac Vincentsz from Haarlem.