Family name Iullus (Iullus 
, יולוס 
) , in all the world, is a very rare surname. The last name Iullus is habitual in Israel, where it is a very rare surname, and Malaysia. Very seldom, Iullus is the forename as well as the last name.
| iullus antonius son of Mark Antony, VA (b. 43) |
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| gaius iulius l. f. vopiscus n. iullus Roman senator, consular tribune in 408 and 405 BC, VA (b. 445) |
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| lucius julius iullus Roman politician, consular tribune 401 BC (b. 450) |
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| lucius iulius iullus Roman politician, consular tribune 403 BC (b. 450) |
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| l. iulius iullus Roman senator, consul in 430 BC (b. 500) |
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| sex. iulius iullus Roman politician (b. 500) |
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| c. iulius c.f.l.n. iullus Roman statesman, consul in 482 BC (b. 600) |
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| vop. iulius c.f.l.n. iullus Roman senator, consul in 473 BC (b. 600) |
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| c. iulius c.f. iullus Roman politician, consul in 489 BC (b. 600) |
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| claudius iullus 1st century legatus pro praetore in Asia |
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| claudius iullus early 1st century Roman who wrote in Greek |
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