E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Monaciello [little monk].
A sort of incubus in the mythology of Naples. It is described as a thick little man, dressed in a monks garment and broadbrimmed hat. Those who will follow when he beckons will be led to a spot where treasure is concealed. Sometimes, however, it is his pleasure to pull the bed-clothes off, and sometimes to sit perched on a sleeper.