Noun

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late Middle English: from Anglo-Norman French, from Latin nomen ‘name’.

wiktionary

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From Middle English noun, from Anglo-Norman noun, non, nom, from Latin nōmen(“name; noun”). The grammatical sense in Latin was a semantic loan from Koine Greek ὄνομα(ónoma). Doublet of name.

etymonline

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noun (n.)

in grammar, "a name; word that denotes a thing (material or immaterial)," late 14c., from Anglo-French noun "name, noun," from Old French nom, non (Modern French nom), from Latin nomen "name, noun" (from PIE root *no-men- "name"). Old English used name to mean "noun." In old use also including adjectives (as noun adjective). Related: Nounal.