Silas \s(i)-las\ as a boy's name is pronounced SYE-las. It is of Latin origin. Short form of Silvanus, from a Greek name meaning "forest, woods". Biblical: Silas was a missionary companion to Paul and Timothy. Used by the Puritans.
Silas has 7 variant forms: Silvan, Silvano, Silvaon, Silvanus, Silvio, Sylas and Sylvan.