Cognomen Hillar (Hillar 
, Хиллар 
) , worldwide, is a rare last name. The surname Hillar is habitual in Paraguay, where it is quite a rare surname, Argentina, where it is a rare surname, and Sweden. Not in comparison with a country's population, the name is most common in Argentina, Poland, and Paraguay. Also, Hillar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hillar | Germany, Paraguay, Argentina, Poland, India |
| Хиллар | Russia |
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hillar mets Estonian cartoonist, EE (b. 1954) |
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| hillar saha EE (b. 1899) |
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| ingrid hillar Swedish painter, SE (b. 1911) |
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| hillar aleksander randalu Estonian legal scholar, EE (b. 1915) |
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| hillar lehari (b. 1915) |
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| małgorzata hillar Polish poet (1926-1995), PL (b. 1926) |
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| hillar hanssoo Estonian educator (b. 1927) |
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| hillar palamets Estonian historian, EE (b. 1927) |
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| hillar aben Estonian architect, EE (b. 1929) |
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| hillar kaal Estonian mountaineer, EE (b. 1930) |
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| hillar kalda Estonian physician and politician, EE (b. 1932) |
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| hillar loskit Estonian boxer, EE (b. 1932) |
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| hillar ojaste (b. 1927) |
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| hillar lauri (b. 1928) |
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| marian hillar American theologian, US (b. 1938) |
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