Arrath Jair is the brother of Thercon Jair.

You might wonder why they're not both from the same tribe, and your curiosity shall be eased: they are not real brothers.

Arrath was found shortly after the discovery of Thercon, floating in an escape pod. It bore the Verokhior sign, and so his saviours, incidentally the same people who rescued Thercon from a slave ship, assumed that the parents ship must have been attacked an destroyed by pirates, preying on the spacefaring Verokhiors.