Family name Cillia (Cillia 
) , around the globe, is a rare surname. The cognomen Cillia is characteristic of Luxembourg, where it is quite a rare surname, Austria, and Italy, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Austria, Italy, and France. Much less frequently, Cillia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cillia | Italy, Luxembourg, Austria, France, South Africa |
| enrico de cillia IT (b. 1910) |
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| jole de cillia IT (b. 1921) |
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| antonio de cillia IT (b. 1921) |
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| rudolf de cillia AT (b. 1950) |
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| carlo de cillia researcher |
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