An alternative spelling of copataine; one of two or more people who share the rank or authority of captain.
From co- + patain (variant of captain, from Old French capitaine, from Latin capitaneus, one who is chief or first). This spelling is archaic.
Copatain shows up in 16th-century naval and military records, but the spelling is so inconsistent that historians debate whether it's a distinct word or just a variant of 'co-captain' with historical spelling variations.
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