Cognomen Liber (Liber 
, Levr 
, Либер 
) , all around the world, is quite a common surname. The cognomen Liber is characteristic of Croatia, where it is quite a common surname, Israel, where it is quite a rare surname, and Hungary. In absolute terms, the name is most common in France, Israel, and Croatia. Likewise, Liber is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Liber | Indonesia, Croatia, Poland, France, Israel |
| Levr | Nigeria, France, United States |
| Либер | Kazakhstan, Ukraine, Belarus, Russia |
| Лібер | Ukraine |
Annals, Leabhar, Lebor, Lebro, Leodan, Leute, Libar, Libe, Libel, Libertine, Liberty, Liberu, Libet, Libre, Libretto, Libru, Liburu, Libèr, Libér, Lioar, Live, Livere, Llibre, Lodge, Loeber, Lyver, Líber, Lïbër, Люди, ליבר, เสรีภาพ, リベル, 丽伯, 丽贝, 俐伯, 俐贝, 利伯, 利贝, 力伯, 力贝, 李贝, 枥贝, 栗伯, 溧伯, 理伯, 理贝, 礼伯, 礼贝, 立伯, 立贝, 荔贝, 莉贝, 里贝, 鲤伯, and 黎贝
| joseph anton liber (b. 1732) |
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| wolfgang liber (b. 1758) |
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| maurice liber French rabbi, FR (b. 1884) |
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| kazimierz liber BY (b. 1875) |
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| jan liber Dutch journalist, NL (b. 1902) |
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rodney liber film producer, US (b. 1963) |
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| liber forti AR (b. 1919) |
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marcin liber PL (b. 1970) |
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| liber ivan composer, conductor and collector of folklore, representative of the Ukrainian diaspora in Romania (b. 1932) |
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| judith liber US (b. 1940) |
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| george liber (b. 1953) |
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| liber galloso musician from Uruguay, UY (b. 1972) |
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| anna liber researcher ORCID ID = 0000-0002-9764-2805 |
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| csaba liber researcher (ORCID 0000-0001-6071-9461) |
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| miran liber researcher |
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