Rias is of Greek origin, derived from the word 'ryo,' meaning 'flowing.' It is a unisex name, although it is more commonly used for males. The name Rias was popularized by the ancient Greek hero Bellerophon's winged horse, Pegasus, whose name in some versions of mythology was Rias.
"The name Rias has seen a consistent increase in popularity over the years, with a notable spike in recent times."