What does Sylvanus mean?
Sylvanus /syl-va-nus/ [3 sylls.] as a name for boys is of Latin derivation, and the meaning of the name Sylvanus is "woods". Sylvanus is an alternate form of Silvanus (Latin) with the prefix Sy-.
How popular is Sylvanus?
Sylvanus is an uncommon first name for males but a somewhat popular surname for both adults and children (#146011 out of 150436, Top 97%). (2000 U.S. Census)
Below is a charted comparison of the popularity of the boy name Sylvanus and affiliated names. Silvio is the only prominent related form of Sylvanus (outside Top 1000). Adoption of this boy name was at its highest during the years 1920-1929 (usage of 0.201%) and is now much less, with Silvio becoming less fashionable. (Top 1000 Birth Names Records, 2014)
A suggested similar baby name is Sylvan. Like Sylvanus, this name is not frequently used.