Illias is a Greek boys' name, derived from the Greek word 'žilíon', which means 'olive tree'. It is often spelled as Iliás in Greek. The name has been used predominantly in Greece and Cyprus but has gained international recognition due to its uniqueness and cultural significance. The most well-known figure with this name is Illias Laliotas, a Greek basketball player who played for the Greek national team.
"Between 2004 and 2023, the name Illias was given to a total of 126 babies, with the most popular year being 2017 when it was chosen for 18 newborns."