Illias is a distinctive boys' name in United States, ranking #6861 in 2018 with 12 recorded births. This places Illias in the top 49% 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 2018, approximately 1 in every 151,289 boys born was named Illias. FALLING Recent data shows the name is currently falling.