Last name Jaanus (Jaanus 
, Янус 
, Яанус ) , throughout the world, is a rare family name. The family name Jaanus is habitual in Northern Europe, particularly Estonia, where it is quite a common surname, Latvia, where it is a rare surname, and Lithuania. In absolute terms, it is the most numerous in Estonia, Russia, and Ukraine. Also, Jaanus is the forename as well as the last name.
| karl jaanus Estonian military personnel and freedom fighter (1899-2000), EE (b. 1899) |
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| aleksander jaanus politician, EE (b. 1904) |
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| voldemar jaanus Estonian politician (1905-1977), EE (b. 1905) |
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| hugo jaanus EE (b. 1926) |
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| liina jaanus Estonian architect (1937-2010), EE (b. 1937) |
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| heini jaanus |
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