RubenDHA wrote:
I bought a secondhand book titled 'Celtic names'. This is what the book says about the name 'Dáire'.
Dáire, Darry, Dary (pronounced like 'daw + ir + ih')
Dáire was a Gaelic god, whose name Dáire means 'fruitful'.
Could this name be related to my surname?
Possibly, but so could many other words starting with d - such as 'dairy' in English. No disrespect at all meant but such speculation is unlikely to resolve your question. You need to do some serious family research as Breandán pointed out. He correctly pointed out that there were several waves of Irish exiles. So perhaps you are related to one of them - or perhaps not at all.
Any chance you have a connection with this place:
http://en.wikipedia.org/wiki/%C3%8Eles_d'Hy%C3%A8res