Last name So (So 
, 素 , سو 
, and others...) , all over the world, is a widespread family name. The cognomen So is characteristic of Hong Kong, where it is a widespread surname, British Virgin Islands, where it is a common surname, and Cayman Islands (explore the name in all countries). Not in comparison with a country's population, the name is most common in China, Hong Kong, and Egypt. Likewise, So is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| So | Myanmar, Taiwan, China, Egypt, Hong Kong |
| 素 | China |
| سو | Syria, Iraq, Egypt, Sudan, Saudi Arabia |
| โซ, ส. | Thailand |
| ソー, ソ | Japan |
| Со | Ukraine, China, Russia, Kyrgyzstan, Kazakhstan |
| סו | Israel |
Chaud, Chiau, Chiou, Chiu, Chong, Chui, Hsu, Ko, Kýr, Mune, Rui, Ruì, Sae, Saga, Salaiar, Saw, Se, Seo, Seu, Show, Shào, Sobrazo, Soe, Soh, Sol, Solange, Solomo, Son, Sou, Su, Such, Sueno, Suh, Sum, Suum, Suus, Svá, Swe, Swo, Swē, Syu, Syuh, Syuu, Sámago, Sä, Så, Sò, Sòo, Só, Sô, Sõ, Sù, Sü, Sýr, Sō, Sŏ, Ső, Sū, Sơ, Sǒ, Sǿ, Sọ, Sỏ, Sồ, Sộ, Sớ, Sờ, Sỡ, Sợ, Sｏ, Tsiau, Tsui, Tô, Từ, Xi, Xiao, Xiào, Xiǎo, Xu, Xú, Xī, Zhao, Zo, Zong, Zoscar, Zuo, Ço, Çò, Çó, Çô, Çõ, Çớ, Śo, Śò, Śó, Śô, Śõ, Śō, Śŏ, Śő, Śǿ, Ŝo, Ŝò, Ŝó, Ŝô, Ŝõ, Ŝō, Ŝŏ, Ŝő, Ŝǿ, Ŝỗ, Šo, Šò, Šó, Šô, Šõ, Šō, Šŏ, Šő, Šǿ, Šở, Ȿo, Ксу, Мунэ, Соу, Су, Сьо, Сю, Сюй, Сюу, Цзун, שו, شو, সো, ซ., ซอ, ซอร์, ซอว์, ซะ, ซิ, ซ่อ, ซ้อ, ซ้ออ่อ, ตันจึง, ปานนี้, ศ., ษอ, สอ, สาแหละ, สิ, ส่อ, หลอ, อิ่น, เซาะ, เสาะ, โซว์, โซห์, โซะ, โซ่, โศ, โส, โสมย์, โสร, โสร์, โสะ, โส้, ใหลน, ใอ่, ຊອ, ສອ, သဴ, სო, សូ, Ṡō, Ṧǿ, Ṩo, Ṩǿ, Ṩợ, しゅう, スオ, スー, ソウ, チュイ, 姓蘇, 宗, 小, 徐, 徐氏, 昭, 瑞, 瑞氏, 笑, 索, 紹, 绍, 绍氏, 苏, 蕭, 蘇, 西, 西哦, 邵, 서, 소, 조, 종, Ｓo, Ｓò, Ｓó, Ｓō, Ｓǒ, and Ｓｏ
| so seo-no Wife of King Dongmyeong of Goguryeo (67-6 BCE) (b. 67) |
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| guillem ramon de castre-pinós i de so (b. 1450) |
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| se-yang so (b. 1486) |
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souw beng kong an ally of the Dutch East India Company and the first Kapitein der Chinezen of Batavia., ID (b. 1580) |
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| shizan so Japanese painter (1733–1805), JP (b. 1733) |
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soh kwang-pom Korean reformist and politician (b. 1859) |
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| yeiko mizobe so JP (b. 1867) |
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john so Hong Kong Australian businessman and Lord Mayor of Melbourne, AU (b. 1946) |
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| so tjwan hong Chinese Indonesian writer and businessperson, ID (b. 1898) |
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| so chol North korean politician, KP (b. 1907) |
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gregory so Hong Kong politician, CA (b. 1958) |
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| james tin yau so acupuncturist (b. 1911) |
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so jinsu KR (b. 1956) |
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so yong kim South Korean-American filmmaker, US (b. 1968) |
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kyu-chun so (b. 1958) |
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