Ercole Chaia (born around 1850 - deceased 1905) was an Italian spiritualist who became particularly well-known for working as manager of the medium Eusapia Palladino. He was responsible for convincing the reputed scientist Cesare Lombroso to attend Palladino's séances, as well as for organising her séance tours in several European countries.
References
Ercole Chiaia Wikipedia(Text) CC BY-SA