A number of modern sources have also claimed the instrument was introduced to Europe from the Arabic regions in a manner similar to the lute, but actual historical data supporting this theory is rare, ambiguous, and may suggest the opposite. The various regional names used (including the Arabic) appear derived over time from a Greco-Roman (Vulgar Latin) origin, although when and how this occurred is presently unknown. It is possible the instrument existed in Europe during a period earlier than the Arabic conquests in the Iberian peninsula with the names diverging alongside the regional evolution of European languages from Latin following the collapse of the Roman Empire.