Cylus is a distinctive boys' name in United States, ranking #8273 in 2004 with 8 recorded births. This places Cylus in the bottom 37% 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 2004, approximately 1 in every 248,100 boys born was named Cylus. FALLING Recent data shows the name is currently falling.