Silvanus

Silvanus (mythology), a Roman tutelary spirit of woods, apparently inherited from the Etruscan deity Selvan
Silvanus, also called Silas, an early Christian and companion of Paul
Silvanus of the Seventy, another early Christian and traditionally among Jesus' seventy apostles
Saint Silvanus was one of the seven sons of Saint Felicity of Rome (2nd century).
Claudius Silvanus, a Roman usurper in 355.
Teachings of Silvanus, a Gnostic text among the texts of the Nag Hammadi library, hidden in Egypt when heterodox writings were being collected and burned and rediscovered in 1945
Silvanus Melea Otieno, posthumously controversial Kenyan lawyer
Silvanus Trevail Cornish architect
Silvanus Trust, a charitable organization that works to develop the viable and sustainable management of small woodlands, concentrating in the southwest of England
Silvanus (Forgotten Realms), a Forgotten Realms Dungeons & Dragons deity.

A variant, Sylvanus, may refer to:

Colonel Sylvanus Thayer, "Father of the United States Military Academy"
Saint Sylvanus, Bishop of Emesa in Phoenicia, martyred in the company of Saint Luke the Deacon and Saint Mucius the Lector in the persecutions of Maximian, c. 311