Last name Khoo (Khoo 
, خو 
, クー 
) , around the world, is a common surname. The surname Khoo is characteristic of South-eastern Asia, particularly Singapore, where it is a common surname, Malaysia, where it is quite a common surname, and Brunei (explore the name in all countries). Measured by absolute frequency, it is commonest in Malaysia, Singapore, and Australia. Likewise, Khoo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Khoo | Australia, Taiwan, Singapore, Indonesia, Malaysia |
| خو | Iran, Morocco, Egypt, Tunisia, Algeria |
| クー | Japan |
| Ку | Ukraine, Kazakhstan, Russia, China, Kyrgyzstan |
| khoo cheng tiong Rice merchant and philanthropist who contributed to the establishment of schools, temples and associations, including the Hokkien Clan Association (b. 1820) |
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khoo teck puat Malaysian, Australian and Singaporean businessman (1917-2004), SG (b. 1917) |
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| khoo sook yuen Singaporean poet (b. 1874) |
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| khoo kay hian A rubber broker who started the Chinese stock broking firm the Kay Hian & Co in 1921 (b. 1878) |
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khoo kay kim Malaysian historian, MY (b. 1937) |
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| khoo sian ewe (b. 1886) |
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| valerie khoo Australian journalist, AU (b. 1901) |
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| khoo teik ee politician, badminton executive and administrator, MY (b. 1902) |
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eric khoo Singaporean film director and producer, SG (b. 1965) |
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khoo poay tiong Malaysian politician (b. 1970) |
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| khoo oon teik nephrologist, SG (b. 1921) |
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adam khoo Singaporean businessman, SG (b. 1974) |
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bevlyn khoo Singaporean singer, SG (b. 1979) |
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robert khoo American businessman, US (b. 1980) |
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| khoo eng huah badminton player, MY (b. 1930) |
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