All around the world, Valdemaras (Valdemaras 
, Вальдемарас 
, Валдемарас ) is a rare masculine first name. The forename Valdemaras is characteristic of Northern Europe, particularly Lithuania, where it is quite a common boy's name, and the United Kingdom, where it is a very rare boy's name. Much less frequently, Valdemaras is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Valdemaras | United Kingdom, Ireland, Lithuania, Germany, United States |
| Вальдемарас | Belarus, Lithuania, Ukraine, Russia |
| Валдемарас | Ukraine, Lithuania, Russia |
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valdemaras razumas Lithuanian chemical engineer, LT (b. 1955) |
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valdemaras chomičius Lithuanian basketball player and coach, LT (b. 1959) |
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valdemaras kukulas Lithuanian journalist, LT (b. 1959) |
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valdemaras rupšys Lithuanian military personnel, LT (b. 1967) |
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| valdemaras manomaitis LT (b. 1912) |
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| valdemaras kvietkauskas LT (b. 1928) |
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| valdemaras anužis Lithuanian politician, LT (b. 1952) |
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| valdemaras jakštas Lithuanian engineer, LT (b. 1958) |
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| valdemaras katkus Lithuanian politician, LT (b. 1958) |
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| valdemaras valkiūnas Lithuanian politician, LT (b. 1959) |
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| valdemaras žvirblis (b. 1949) |
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| valdemaras vareika Lithuanian engineer, LT (b. 1963) |
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| valdemaras šimėnas LT (b. 1954) |
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| valdemaras gedminas (b. 1964) |
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| valdemaras jasevičius LT (b. 1964) |
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Nas, Navickas, Valiunas, Vilpišauskas, Sarapinas, Aleksiukas, Adomaitis, Aidukonis, Catrauskas, Baltakaitis, Petraitis, Romanovas, Litvaitis, Jasevskis, Juozaitis, Neliubsys, Valauskas, Arcimavicius, Berzinskis, Gintauskas, Milinkevicius, Pinkevicius, Rakickas, Klasauskas, Kempinas, Bagdonas, Ius, Mockus, Aleksa, Bunkus, Raizys, Rupsys, Doskus, Jurkus, Medieksa, Stonkus, Antanavicius, Skugaras, Burakov, Pipiras, Dirgela, Tevelis, Urbonas, Montvydas, Miseikis, Savickas, Sivickij, Streigis, Anužis, and Juozapavicius