Illias is a distinctive boys' name in United States, ranking #9296 in 2004 with 7 recorded births. This places Illias in the bottom 30% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2017 with 18 births ranking #5177. In 2004, approximately 1 in every 283,543 boys born was named Illias. FALLING Recent data shows the name is currently falling.