Tuirc (Irish) comes from Medieval Latin Turcia, from Latin Turcus, from Greek Τοῦρκος, from Persian ترک, from Middle Persian twlk', from Old Turkic 𐱅𐰇𐰼𐰜, from Proto-Turkic *tür(ü)k — Turk, Turkic people.
Tuirc (Irish): Turkey