Mythology

google

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late Middle English: from French mythologie, or via late Latin from Greek muthologia, from muthos ‘myth’ + -logia (see -logy).

wiktionary

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First attested as Middle English[Term?] in 1412. From Middle French mythologie, from Latin mythologia, from Ancient Greek μυθολογία(muthología, “legend”) μυθολογέω(muthologéō, “I tell tales”), from μυθολόγος(muthológos, “legend”), from μῦθος(mûthos, “story”) + λέγω(légō, “I say”).

etymonline

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mythology (n.)

early 15c., "exposition of myths, the investigation and interpretation of myths," from Late Latin mythologia, from Greek mythologia "legendary lore, a telling of mythic legends; a legend, story, tale," from mythos "myth" (a word of unknown origin; see myth) + -logia (see -logy "study"). Meaning "a body or system of myths" is recorded by 1781.