Mid 17th century; earliest use found in John Gaule (1603/4–1687), Church of England clergyman and author. From ancient Greek ὀνειροπόλος an interpreter of dreams + -ist.
Definition of oneiropolist in US English:
oneiropolist
nounə(ʊ)ˌnʌɪˈrɒpəlɪst
A person who interprets dreams.
Origin
Mid 17th century; earliest use found in John Gaule (1603/4–1687), Church of England clergyman and author. From ancient Greek ὀνειροπόλος an interpreter of dreams + -ist.