Across the world, Sylvestr (Сильвестр 
, Силвестр , Sylvestr 
) is a rare boy's first name. The forename Sylvestr is habitual in Ukraine, where it is a rare male name, Kazakhstan, where it is a very rare male name, and Russia. Very seldom, Sylvestr is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Сильвестр | Kazakhstan, Ukraine, Belarus, Russia |
| Силвестр | Russia |
| Sylvestr | China, Czechia, Nigeria, United States, Slovakia |
Silvester, Silvestr, Sylvester, Szilveszter, Силвестер, Сильвестер, Сылвестр, Сільвестер, Сільвестр, سيلفستر, and 西尔维斯特
Sylvestr is also a name for the fictitious and mythical characters: Sylvester Pemberton , the fictional superhero in the DC Comics universe, Absolute Justice and Sylvester Koetsier , character in Goede tijden, slechte tijden.