'aeonicaeonist' originates from the Greek word 'aion,' meaning 'age' or 'eternity,' combined with the suffix '-ist,' indicating a person who practices or is concerned with something.

'Aion' transformed into the Latin 'aeon,' and eventually became part of the modern English word 'aeonicaeonist.'

Initially, it meant 'a person concerned with ages or eternity,' and this meaning has largely remained the same in modern usage.