In Irish: Dia 's Muire dhuit. (to one person).
Dia's Muire dhaoibh.
In Irish Gaelic it was usual to say Dia linn or "God with-us".
Dia
In Irish Gaelic: Moladh le Dia In Scottish Gaelic:
I nAinm Dé
briathar Dé
You need to specify Irish Gaelic or Scottish Gaelic: they are two separate languages.
No Irish Gaelic version.
In Irish Gaelic: saoirse
The typical greeting in Irish Gaelic is "Día duit," used where "Hello" is used in English and literally meaning "God with you." The response to this greeting is "Día's Muire duit," and literally means "God and Mary with you."
sneachta is how you would say snow in Irish Gaelic
In Irish Gaelic the name would be Máire Ní Dhonnchú (but Máire Uí Dhonnchú if a married name.)