If by 'Ancient Irish' you mean "Old Irish" it is "teg, tech". Modern Irish is tigh/teach.
how do you say my country in irish
Irish isn't ancient it is still spoken Ó Maoilchluiche - O Meel-khlih-heh
How do you say "for four days " in irish?
The way to say egg in Irish is ubh
In Irish "ancient watch " is "sean-uaireadóir".
No Irish version.
No Irish form.
"luckily in Irish"
Caitríona in Irish.
No Irish version.
In Irish it's "an Rí na mbuaiteorí ar fad". The Norse language and Gaelic are not closely related, BTW.