The Irish people are devout Christians.
god
It's a euphemism for 'By God' and it not from Irish Gaelic.
Carraig Dé is 'Rock of God'
The Irish name that means "god smiles" is Aodhán. It is derived from the Gaelic word "aodh," meaning fire or god, combined with the diminutive suffix "-án."
SeanThe name Sean is a baby boy name. The name Sean comes from the Irish origin. In Irish The meaning of the name Sean is: Irish variant of John: God is gracious; gift from God
Yes. The dominant religion of the Irish is Catholicism.
In Irish it would be trí dheonú Dé (by the grace of God).
Manannán was.
Dia
níl aon Dia is é do Dhia Literally means: Not any god is your god
In Irish Gaelic it was usual to say Dia linn or "God with-us".