Last name Lilja (Лиля 
, Lilja 
, リリア 
) , throughout the world, is a common family name. The cognomen Lilja is habitual in Northern Europe, particularly Sweden, where it is quite a common surname, Finland, and Iceland. Not in comparison with a country's population, it is commonest in Sweden, Finland, and Russia. Likewise, Lilja is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Лиля | Kazakhstan, Uzbekistan, Russia, United States, Tajikistan |
| Lilja | Denmark, Finland, Sweden, Iceland, United States |
| リリア | Japan |
| Лилья | Kazakhstan, Russia |
| maria lilja (b. 1724) |
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nils lilja Swedish botanist, writer, editor and watchmaker (1808–1870), SE (b. 1808) |
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| peter lilja Swedish military personnel, SE (b. 1764) |
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carl fredrik lilja (b. 1812) |
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| gustaf august lilja (b. 1798) |
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gertrud lilja Swedish writer, SE (b. 1887) |
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sven lilja Swedish musician, SE (b. 1887) |
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| lilja gottskálksdóttir IS (b. 1831) |
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harald lilja Finnish military officer, FI (b. 1896) |
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| anni lilja Finnish writer, FI (b. 1871) |
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| anna lilja Finnish teacher, FI (b. 1876) |
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| lilja sigurðardóttir Icelandic teacher, IS (b. 1884) |
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| john lilja Swedish sprinter, SE (b. 1893) |
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| lilja björnsdóttir Icelandic poet, IS (b. 1894) |
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| bernhard lilja Swedish pianist (1895-1984), SE (b. 1895) |
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