In all the world, Hiếu (Hiếu 
) is a common predominantly masculine, but scarcely girly first name. The forename Hiếu is habitual in South-eastern Asia, particularly Vietnam, where it is quite a common predominantly masculine, but very infrequently girly name. Likewise, Hiếu is the last name as well as the forename.
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| Hiếu | Japan, China, Vietnam, Australia, United States |
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hiếu trang duệ hoàng hậu Ming Dynasty empress, VN (b. 1426) |
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| hiếu khang hoàng hậu Empress Dowager Ý Tĩnh, VN (b. 1736) |
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| nguyễn văn hiếu Nguyễn's functionary (b. 1746) |
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lưu chí hiếu VN (b. 1913) |
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nguyễn văn hiếu South Vietnamese army general (1929-1975), VN (b. 1929) |
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trần hiếu Vietnamese singer, VN (b. 1936) |
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vương trung hiếu Vietnamese writer, VN (b. 1959) |
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| trần quang hiếu Vietnamese painter (1938-1985), VN (b. 1938) |
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lê hiếu |
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| nguyễn trung hiếu Vietnamese politician, VN (b. 1959) |
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| nguyễn văn hiếu Vietnamese politician, VN (b. 1959) |
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| vũ minh hiếu Vietnamese football player, VN (b. 1972) |
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| hiếu hiền vietnamese actor, VN (b. 1977) |
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| mai công hiếu Vietnamese cyclist, VN (b. 1978) |
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| nguyễn trung hiếu Vietnamese sport shooter, VN (b. 1979) |
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