All Worbals have a spot in their names reserved for titles. There are a few titles a Worbal can have, Rerias being the highest. These can all mean different things, but all are given to those who’ve exceeded the ordinary. These titles are different from professions.
For example, Corval Sevalra is a doctor, and may be professionally referred to as "Doctor Sevalra" or "Doctor Corval", but Doctor is not their title. In the case that Worbals have a professional title and receive an actual title, their actual title receives priority.
Worbals can receive the award of a title, but decline to use it if they wish.
Being named Rerias means that you are at the top of your field and/or did something extraordinary. There are multiple Reriai, and they often have access to resources the general public do not. The name ‘Rerias' comes from the group of Worbals that stayed behind on Cansevai to detonate the star. The title is regarded with prestige among Worbals.
The Reriai Council is a council of members who’ve received the Rerias title. They are the givers of more Rerias titles. Though the government does have the ability to name Reriai, though they often don’t and mainly serve as a backup should all of the Worbals on the Reriai Council die off or be otherwise incapable of naming more.
"Out of Lore, Rerias is a title given to those who have helped in the creation of the Worbals significantly" -bandy