Family name Linnus (Linnus 
) , around the world, is a rare cognomen. The family name Linnus is habitual in Estonia, where it is quite a rare surname, Finland, where it is a rare surname, and Nigeria, where it is a very rare surname. Measured by absolute frequency, the name is most common in Estonia, Nigeria, and the United States. Much less frequently, Linnus is the forename as well as the last name.
| ferdinand linnus Estonian ethnologist (1895-1942), EE (b. 1895) |
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| olavi linnus Finnish writer, screenwriter and translator, FI (b. 1914) |
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| jüri linnus Estonian historian, EE (b. 1926) |
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| tanel linnus (b. 1954) |
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| timo linnus FI (b. 1962) |
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