One theory about the origin of the name Riga is that it is a corrupted borrowing from the Liv ringa meaning loop, referring to the ancient natural harbour formed by the tributary loop of the Daugava River. The other is that Riga owes its name to this already-established role in commerce between East and West, as a borrowing of the Latvian rija, for threshing barn, the "j" becoming a "g" in German — notably, Riga is called Rie by English geographer Richard Hakluyt (1589), and German historian Dionysius Fabricius (1610) confirms the origin of Riga from rija. Another theory could be that Riga was named after Riege, the German name for the River Rīdzene, a tributary of the Daugava.
Another theory is that Riga's name is introduced by the bishop Albert, initiator of christening and conquest of Livonian and Baltic people. He introduced also an explanation of city name as derived from Latin rigata ("irrigated") that symbolizes an "irrigation of dry pagan souls by Christianity".