The R Guadalquivir is called R Baetis by the Romans and R Tartessos by the Phenicians before them. Tartessos is also the name of an ancient tribe who lived in this area of Huelva-Sevilla-Cadix. The ancient city of Tartessos is located with some uncertainty on the present Isle of Leon at San Fernando, South of the bay of Cadix. This island was once detached from the coast. However, Avienus indicates in his Ora Maritima That Tartessus is the ancient name of Gaddir. Pliny the Elder locates Tartessos at Carteia the the Bay of Algesiras (Nat Hist, 3, 3). Some believe it is Huelva.