Cylus is a distinctive boys' name in United States, ranking #1884 in 2012 with 77 recorded births. This places Cylus in the top 13% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2012 with 77 births ranking #1884. In 2012, approximately 1 in every 24,631 boys born was named Cylus. FALLING Recent data shows the name is currently falling.