It is the past tense of Tá. Bhí sé, he was. (Irish has two forms of 'to be'.)
'Will' is not an Irish word and has no meaning in Irish.
'Colt' is not an Irish word. The Irish word for colt is bromach.
Not an Irish word.
'Brandie' is not a word in the Irish language.
It's not a word in Irish Gaelic.
'Late' is a word in English not Irish.
Ryann is not an Irish word and has no meaning in Irish.
It is not an Irish (Gaelic) word.
'macy' is not a word in Irish.
'Elverys' is not a word in Irish.
Aryn is not an Irish word.
It is not a word in the Irish language.