As this seems to have been much the more important of the two Trebula (the other being Trebula Suffenas), it is probably that meant by Strabo, who mentions Trebula without any distinctive adjunct but in conjunction with Eretum.
As this appears to be the more prominent of the two Trebulae (the other being Trebula Suffenas), it is probable that Strabo had Trebula in mind, which he mentions together with Eretum without any distinctive adjunct.