Family name 是 (是 
) , in the entire world, is a common cognomen. The family name 是 is habitual in Eastern Asia, particularly China, where it is quite a rare surname. Very seldom, 是 is the forename as well as the last name.
| 是儀 3rd century official of the state of Eastern Wu, CN (b. 165) |
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| 是勳剛 CN (b. 1935) |
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| 是元介 Taiwanese actor, singer and television host, TW (b. 1983) |
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