Musician

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late Middle English: from Old French musicien, from Latin musica (see music).

wiktionary

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From Middle English musician, musicien, from Old French musicien(“musician”). Equivalent to music and -ian.

etymonline

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musician (n.)

late 14c., musicien, "one skilled in music," from Old French musicien (14c.), or a native formation from music + -ian. Sense of "professional musical performer" is attested from mid-15c.