coeval
adjective
[ kəʊˈiːv(ə)l ]
• having the same age or date of origin; contemporary.
• "these lavas were coeval with the volcanic activity"
coeval
noun
• a person of roughly the same age as oneself; a contemporary.
• "like so many of his coevals, he yearned for stability"
Origin:
early 17th century (as a noun): from late Latin coaevus, from co- ‘jointly’ + Latin aevum ‘age’.