Cognomen Ciaia (Ciaia 
) , in all the world, is a very rare surname. The cognomen Ciaia is characteristic of Southern Europe, particularly Italy, where it is a very rare surname. More frequently, Ciaia is the forename as well as the last name.
| alessandro della ciaia Italian composer (b. 1605) |
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| domenico maria della ciaia Roman Catholic bishop, IT (b. 1642) |
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| azzolino bernardino della ciaia Italian composer (1671-1755), IT (b. 1671) |
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ignazio ciaia Italian patriot and poet (1766-1799), IT (b. 1766) |
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| marco tonci ottieri della ciaia Italian politician, IT (b. 1870) |
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| virginia di ciaia |
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| olimpia della ciaia |
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| tiberio della ciaia, patrizio di siena |
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