"efrog" in Welsh, "eabhrac" in Irish Gaelic and "eabhraig" in Scottish Gaelic, by which names the city is known in those languages); or less probably, "Eburos", 'property', which is a personal Celtic name mentioned in different documents as "Eβουρος", "Eburus" and "Eburius", and which, combined with the same suffix "*-āko(n)", could denote a property.
Menijo, da so govorili keltski jezik, povezan s sodobno valižanščino.