Cognomen Kilius (Kilius 
) , around the world, is a rare last name. The family name Kilius is habitual in Lithuania, where it is quite a rare surname, Germany, where it is a very rare surname, and New Zealand. Measured by absolute frequency, it is commonest in Lithuania, Germany, and Canada. Much less frequently, Kilius is the forename as well as the last name.
| jonas kilius Lithuanian missionary, LT (b. 1876) |
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marika kilius German pair skater, DE (b. 1943) |
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| jonas kilius Lithuanian germanist (1938-2012), LT (b. 1938) |
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