Where does “Tuircis” come from?

Tuircis (Irish) comes from Irish Tuirc, 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.

Tuircis (Irish): the Turkish language

Definitions

the Turkish language

Ancestry of “Tuircis”, step by step

Step	Language	Word	Meaning
1	Irish	Tuirc	Turkey
2	Medieval Latin	Turcia	—
3	Latin	Turcus	Turk
4	Greek	Τοῦρκος	male Turk person from or who lives in Turkey
5	Persian	ترک	crack
6	Middle Persian	twlk'	—
7	Old Turkic	𐱅𐰇𐰼𐰜	Turk
8	Proto-Turkic	*tür(ü)k	Turk, Turkic people

Every word from Proto-Turkic *tür(ü)k →Every word from Old Turkic 𐱅𐰇𐰼𐰜 →Every word from Middle Persian twlk' →