A surname, or historically, one who examines or tests, particularly someone who inspected ships or goods.
Middle English occupational surname from 'connen' (to examine, test), related to 'can' (to know). Maritime usage referred to ship inspectors who examined vessels for seaworthiness.
This surname preserves an ancient form of quality control - when international trade depended on individual experts who could 'conn' (examine) ships and cargo, their expertise was literally their identity.
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