Coe

wiktionary

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English surname, from Middle English co and Old English ca(“jackdaw”), similar to caw, Scots ka.

etymonline

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coe (n.)

"hut built by miners over a mine shaft," to store their equipment, etc., 1650s, from some source akin to Dutch kouw, German kaue in the same sense, from West Germanic *kauja-, an early borrowing of Latin cavea "hollow," from cavus "a hollow" (from PIE root *keue- "to swell," also "vault, hole").