Sylvanus is a distinctive boys' name in United States, ranking #10648 in 2021 with 7 recorded births. This places Sylvanus in the bottom 24% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2005 with 8 births ranking #8983. In 2021, approximately 1 in every 249,748 boys born was named Sylvanus. FALLING Recent data shows the name is currently falling.