Globally, Робертас (Robertas 
, Робертас 
) is quite a rare masculine first name. The forename Робертас is characteristic of Northern Europe, particularly Lithuania, where it is quite a common male name, Ireland, where it is a rare masculine name, and Latvia. Not in comparison with a country's population, the name is most common in Lithuania, the United Kingdom, and Russia. Very seldom, Робертас is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Robertas | Lithuania, United Kingdom, Spain, Philippines, Israel |
| Робертас | Kazakhstan, Russia, Belarus, Ukraine, Lithuania |
Bert, Bob, Rob, Robat, Robert, Roberth, Roberto, Roberts, Robertus, Robrecht, Róbert, Röbi, Röpke, Μπομπ, Ρόμπερτ, Берт, Боб, Лысый, Репке, Роб, Робат, Робер, Роберт, Роберто, Робертс, Робертус, Робэрт, בוב, רוב, רוברט, רוברטו, רוברטס, بوب, روب, روبرت, روبرتس, روبرتو, বব, ボブ, ロバーツ, ロバート, ロブ, ロベルト, ロベール, 罗布, 羅伯特, 羅拔, and 鲍勃
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антинис, робертас Lithuanian sculptor (1898-1981), LT (b. 1898) |
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пошкус, робертас Lithuanian footballer, LT (b. 1979) |
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явтокас, робертас Lithuanian basketball player, LT (b. 1980) |
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| робертас антинис Lithuanian artist, LT (b. 1946) |
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| суткус, робертас Lithuanian chess player (1953-2008), LT (b. 1953) |
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| стасенас, робертас LT (b. 1951) |
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| тауткус, робертас генрикович Lithuanian association football player, LT (b. 1963) |
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| жалис, робертас Lithuanian association football player, LT (b. 1965) |
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| фридрикас, робертас брониславович Lithuanian footballer, LT (b. 1967) |
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| робертас петраускас Lithuanian historian, LT (b. 1976) |
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| рингис, робертас Lithuanian footballer, LT (b. 1979) |
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| вежявичюс, робертас Lithuanian association football player, LT (b. 1986) |
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Пупкус, Кучинскас, Григалюнас, Станкунас, Стерблис, Кулявичюс, Котляров, Сукарявичус, Иванаускас, Балтрунас, Кашкенов, Мотеюнас, Мацедульскас, Клангаускас, Коресас, Римкус, Шукаль, Янкус, Шанин, Рудокас, and Лебедникас