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Family name Jj (Jj , Й , 傑傑 ) , around the globe, is a common last name. The family name Jj is characteristic of Brunei, where it is quite a common surname, Myanmar, where it is quite a rare surname, and Macao. Measured by absolute frequency, it most frequently occurs in Myanmar, China, and Saudi Arabia. Also, Jj is the forename as well as the last name.