Ibrahim ibn Jakub
zsidó neve Abraham ben Jacob, arabul Ibrâhîm ibn Ya`qûb al-Tartushi
Hispano-Arabic, Sephardi Jewish (written and oral history, as well as his writings indicate his Jewish background,) traveller, probably a merchant, whose brief may have included diplomacy and espionage
Ibrahim ibn Jakub szövege: Monumenta Poloniae historica. Series nova = Pomniki dziejowe Polski I. Ed. T. Kowalski (Kraków, 1946).