Terinbero

The Terinbero was an apprentice to the order of the Bair.Every Tirbair spent four months out of the year under the tutelage of his bair and the other eight traveling far and wide to gather news, carry messages and hunt. It was this constant movement of the tirbairs that helped keep the Beiabarnae so closely-knit as a people.

speculations
While Bair seems to stem from gothic bairan (to bear), tir seems to be the anglo-saxon word tír (fame, glory, honor).So Tirbair could be understood as one bearing honor though more likely originally Honored Bear' was intended, which could be rendered as Terinbero in latinized Gothic.

Literature

 * Beornings and Woodmen (Essay), by Anna Arquette 1995, originally conceived as a contribution to Rohirrim and Other Northmen, a projected volume in ICE's "Peoples of Middle-earth" series which never reached completion.