English
eternitarian
From eternity + -arian.
Formed from eternity + -arian
Proto-Indo-European *h₂eyu- ‘long time, lifetime’
…
Latin aeternus ‘eternal’
Latin aeternitās
Old French eternité
Middle English eternyte ‘Existence without end’
English eternity
Today it means
noun One who believes in the eternity of the soul.
Language periods are conventional ranges, not dates for this word.
Etymograph / eternitarian