Ceridwen Mirriam Dulciate is a character in The Hollows series by Kim Harrison. She is a thousand-year-old elf and former demon familiar.
― Anonymous User 3/18/2022
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Ceridwen is the name of one of the murder victims in Ethel Lina White's novel Some Must Watch (filmed as The Spiral Staircase, which does not have any character so named).