In the movie Peter Pan, Captain Hook is called Captain Hook because he has a hook hand and is a ship captain, similar to how my friends call me Mr Micropenis

Captain Hook, Wiki

Captain Hook, Disney Wiki

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Hook Is A Perfect Film And I Will Fight, Fly, And Crow For It

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Captain Hook, Jake and the Never Land Pirates Wiki

Captain Hook Gets Offended comedy, The Walt Disney Company

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Captain Hook - Wikipedia

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Captain Hook, Wiki

Peter Von Brown: LEFT with the RIGHT Answer

In the movie Peter Pan, Captain Hook is called Captain Hook