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Last name Young-Ja (영자 , Young-Ja , ヨンジャ) , in all the world, is an extremely rare surname. The surname Young-Ja is habitual in Chile, where it is an extremely rare surname, and the United States. Much more prevalently, Young-Ja is the forename as well as the last name. Parts of the name also exists independently as a last name Young, and a first name Ja.