Siblíní is 'siblings' in Irish.
It is an English name and most likely has no Irish Gaelic form.
Irish is: an áitScottish Gaelic is: an t-àite
In Irish (Gaelic) it is "leathcheann". In (Scottish) Gaelic: ?
In Irish: do dheartháir In Scottish Gaelic: do bhràthair
I am his friend
In Irish it's "fiosracht"
In Irish it's "neamhspleáchas"
In Irish it's "drabhlás"
In Irish it's "baile"
"ifreann" means "hell"
"Gaelic" can mean "Irish Gaelic' or "Scottish Gaelic". They are classified as two distinct languages.
You need to specify Irish Gaelic or Scottish Gaelic: they are two separate languages.