Miner

google

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Middle English: from Old French minour, from miner ‘to mine’ (see mine2).

wiktionary

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mine +‎  -er

etymonline

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miner (n.)

c. 1300 (early 13c. as a surname), "one who mines, a person engaged in digging for metals or minerals or in digging a military mine," from Old French mineour (13c.), agent noun from miner "to mine" (see mine (v.1)).