Family name Cius (Cius 
) , around the globe, is quite a rare last name. The family name Cius is habitual in Bahamas, where it is quite a rare surname, Moldova, and Haiti. In absolute terms, it is commonest in Indonesia, the United States, and Brazil. Much less frequently, Cius is the forename as well as the last name.
| mithridates ii of cius ruler of Cius (b. 386) |
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| ariobarzanes ii of cius politician (b. 400) |
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| mithridates of cius politician (b. 500) |
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