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Cognomen Loncha (Loncho , Loncha ) , worldwide, is a rare surname. The last name Loncha is habitual in Oman, where it is quite a rare surname, Romania, where it is a rare surname, and Nicaragua, where it is a very rare surname. Measured by absolute frequency, the name is most common in Oman, Romania, and India. Very seldom, Loncha is the forename as well as the last name.