Surname Siu (Siu 
, سيو 
, シウ 
) , in all the world, is a common last name. The cognomen Siu is characteristic of Hong Kong, where it is a common surname, Bermuda, and Cayman Islands (explore the name in all countries). In absolute terms, the name is most common in Hong Kong, China, and the United States. Likewise, Siu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siu | China, Taiwan, Indonesia, United States, Hong Kong |
| سيو | Saudi Arabia, Syria, Iraq, Morocco, Sudan |
| シウ | Japan |
| Sjau | United States, Malaysia, India |
Hsiao, Se, Sei, Seow, Shao, Shaw, Shiu, Si, Sia, Siao, Siau, Siaw, Sie, Siew, Siow, Siù, Siú, Siō, Sju, Sìu, Síu, Sỉu, Thiệu, Tiêu, Xiao, Xiu, Xiāo, Ze, Zi, Çiu, Šiu, Съю, Сью, Сю, Сяо, Сіу, Шао, شياو, ซิว, သို, သို့, သိုး, သိုးးးးးးး, သိုး္, သို်, သိ့ု, သ္ိုး, သ်ိုး, シャオ, シュー, ㄙㄩ, 修, 萧, 蕭, 邵, 邵氏, 소, 시우, Ｓiｕ, and Ｓīū
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yum-tong siu Chinese mathematician, US (b. 1943) |
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raymond siu Commissioner of Police in Hong Kong Special Administrative Region (b. 1966) |
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| paul c. p. siu (b. 1906) |
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| ralph siu American author, scholar, military, and civil servant, US (b. 1917) |
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| siu ming (b. 1914) |
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| siu sang Hong Kong film director and television producer (b. 1927) |
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| siu yin fei (b. 1920) |
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siu ka yi, kathy politician (b. 1983) |
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| victoria m. cha-tsu siu 1935--2010; Cha-Tsu Siu, Victoria M.; Tsu Siu, Victoria M. Cha- (b. 1935) |
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siu leong association football player (b. 1987) |
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| siu pui (b. 1931) |
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| josé ginés siu Spanish gymnast, ES (b. 1946) |
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| gordon siu (b. 1945) |
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| arlen siu Nicaraguan revolutionary (1955-1975), NI (b. 1955) |
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| helen f. siu (b. 1950) |
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