Surname Sylvesteri (Silvester 
, Sylvesteri 
) , throughout the world, is a common family name. The cognomen Sylvesteri is characteristic of Guernsey, where it is quite a common surname, Slovenia, where it is quite a rare surname, and Tanzania. Not in comparison with a country's population, it most frequently occurs in Tanzania, Nigeria, and the United Kingdom. Likewise, Sylvesteri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Silvester | United Kingdom, Tanzania, Kenya, Nigeria, Indonesia |
| Sylvesteri | Canada |