Why was Domdaniel called that - I know it means 'house of Daniel', but why?

It was a fictional cavernous hall at the bottom of the ocean where evil magicians, spirits and goblins met. First mentioned in "Arabian Nights" (Dom Chaves and Cazotte 1788/1793) Later used by name in Robert Southey's poem Thalabe, Nathaniel Hawthorne's The House of the seven Gables and in H.P. LOvecraft's short story He

Sources Brewers Dictionary and Wikipedia

Yes, ta, I know what it is. I have a need to know why...
PS Nice to see a book as a reference. I've got Brewers...