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Last name Ritch (Ritch , 里奇 , ريتش ) , throughout the world, is quite a rare surname. The cognomen Ritch is habitual in Latin America and the Caribbean, particularly Cayman Islands, where it is quite a rare surname, Bahamas, and Jamaica. In absolute terms, the name is most common in the United States, the United Kingdom, and Canada. Also, Ritch is the forename as well as the last name.