Family name De Juan (De Juan 
) , across the world, is a common last name. The family name De Juan is characteristic of Philippines, where it is quite a rare surname, Spain, and Kuwait, where it is a rare surname. Measured by absolute frequency, it is commonest in Philippines, Spain, and Saudi Arabia.
| VARIANT | COUNTRY |
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| De Juan | Philippines, Argentina, Saudi Arabia, Spain, Afghanistan |
| ronaldo de juan Argentine painter and draftsman, AR (b. 1930) |
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federico de juan ES (b. 1973) |
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| jordi de juan i casadevall Spanish lawyer and politician, ES (b. 1967) |
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| anna de juan researcher ORCID ID = 0000-0002-6662-2019 |
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| de juan-sanz j researcher |
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| fernando de juan researcher |
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