The only free and comprehensive online etymological dictionary of the Spanish language
evo m. (Noun) "eternity"

18th cent. term used in poetry and theological works. From Latin aevum "time," "eternity." Old Latin aivom. From Proto-Italic *aiwo- 'id.' From Proto-Indo-European *h2ei̯-u̯o- "time," from *h2ei̯-éu̯- "lifetime." From the root *h2ei̯- "to force;" always used in some sense in the matter of law, duty, and life.

Romance: Western Vulgar Latin: Portuguese evo, Italian evo; Eastern Vulgar Latin: Romanian ev

Italic: Oscan aítateís "of the age," Paelignian aetatu "age"

Indo-European: Germanic: Gothic aiws "eternity," Old High German ēwa 'id.,' Old Saxon ēwa 'id.;' Albanian: as "not;" Hellenic: Ancient Greek αἰϝεί (aiweí) "forever;" Armenian: oč' "not;" Indo-Iranian: Sanskrit ā́yu "life," Old Avestan yauuaē-jī- "living eternally"