Family name Illius (Illius 
) , all over the world, is a very rare last name. The family name Illius is habitual in Germany, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Likewise, Illius is the forename as well as the last name.
| wilhelmina maria illius (b. 1756) |
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| bruno illius DE (b. 1956) |
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