In Galicia, as in Ireland, a king was the head of the Trebas, until the early thirteenth century, when after the King of Galicia, Petrus Arteiru confirms as “Rex of [the Terra of] Melide” the chronological clauses of a diploma . However, in the Latin Gallaecia epigraphic record, the rejection of Rome towards this institution, are not recorded kings (heretics), but princes:
“Nicer Clutosi Principis Albionum”; “Caisaros Ceccig(um) Pr(inceps?) Arcailo(rum)”; “(Ve)cius Verobli f princeps (Coporum).
Until the end of twelfth century, in the clauses of medieval parchment documents, the head (= Tanaiste) of every noble Galician clan or family, retains not only his title of prince of terra, but also he retains possession of the Terra (treba, toudo, ciuitas, populus) with the same territorial extent and boundaries that had in the Iron Age.