'Abú' would literally mean 'For ever!' as in Ó Dónaill Abú! (O'Donnell for ever!). 'Abú' is commonly used in Ireland as a chant to show support especially in sport. For example, in Gaelic Games the supporters of Meath (a county team in Gaelic games) will hold banners and shout 'An Mhí Abú!'meaning 'to Meath the victory!' or 'up Meath!'. In the sporting context the word 'Abú' is in common use throughout Ireland and is not restricted in its use to the Irish speaking (Gaeltacht) communities.
'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.