Final

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Middle English (in the adjectival sense ‘conclusive’): from Old French, or from Latin finalis, from finis ‘end’. Compare with finish.

wiktionary

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From Middle English final, fynal, fynall, from Old French final, from Latin fīnālis(“of or relating to the end or to boundaries”), from fīnis(“end”); see fine. Replaced native English endly(“final”)

etymonline

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final (adj.)

early 14c., from Old French final "final, last," and directly from Late Latin finalis "of or pertaining to an end, concluding, final," from finis "end" (see finish (v.)). As a noun, late 14c., "that which comes last;" meaning "final contest" in a sporting sense is from 1880. As a shortening of final examination, from 1880.