From Old Galician-Portuguese taful, tafur, from Arabic تَكْفُور (takfūr, “Armenian king”), from Middle Armenian թագւոր (tʻagwor, “king”), from Old Armenian թագաւոր (tʻagawor, “king”), from Parthian *tag(a)-bar (“king”, literally “crown bearing”).
Cognate with Galician tafur, Spanish tahúr, Catalan tafur and Turkish tekfur.