Last name 徐 (Xu 
, 徐 , 서 
) , in the world, is a prevalent cognomen. The family name 徐 is characteristic of China, where it is a prevalent surname, Cayman Islands, where it is a widespread surname, and Bermuda (explore the name in all countries). In absolute terms, it is commonest in China, South Korea, and the United States. Very seldom, 徐 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Xu | China, Indonesia, Australia, Hong Kong, United States |
| 徐 | China |
| 서 | South Korea |
| Xú | Vietnam, China, Myanmar, Brazil |
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徐庶 3rd century Chinese state of Cao Wei official, CN (b. 101) |
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| 徐榮 Chinese Han dynasty general (died 192), CN (b. 101) |
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徐晃 Chinese general serving warlord Cao Cao (died 227), CN (b. 169) |
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| 徐邈 Cao Wei politician (172-249), CN (b. 172) |
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| 徐惠 Poet and consort to Emperor Taizong of Tang, CN (b. 627) |
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| 徐某 Tang dynasty person CBDB = 142033, CN (b. 823) |
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| 徐熙 Chinese painter (886-975), CN (b. 886) |
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徐達 Ming Dynasty founding general, father of Empress Xu of Yongle Emperor (1332-1385), CN (b. 1332) |
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| 徐壽輝 Chinese rebel, Tianwan emperor, CN (b. 1301) |
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| 徐賁 Ming dynasty person CBDB = 34387, CN (b. 1335) |
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| 徐有貞 Ming dynasty politician, CN (b. 1407) |
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徐禎卿 Ming dynasty person CBDB = 33842, CN (b. 1479) |
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徐階 Ming dynasty person CBDB = 68547, CN (b. 1503) |
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徐渭 Ming Dynasty painter (1521-1593), CN (b. 1521) |
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| 徐淮 politician, CN (b. 1474) |
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