Namesakes
Bishops of Rome and the Popes:
3 popes, 1 antipope
Sylvester I (a.k.a. Silvester) 314-335 
Sylvester II (a.k.a. Silvester) 999-1003
Sylvester III (a.k.a. Silvester) 1045
Sylvester (a.k.a. Silvester) 1105-1111
Olympic Medalists:
1 gold
(gold) Silvester Takač 1960 football
Saints:
3 saints, 1 blessed
Saint Sylvester I (a.k.a. Silvester) 285-335
Saint Sylvester Gozzolini (a.k.a. Silvester) 1177-1267
Saint Sylvester of Troina (a.k.a. Silvester) ?-1185
Blessed Silvestro of Valdisieve (a.k.a. Silvester) ?-1348