For my user name and all it's variants (from my mother's side of the family) I of course found most in Ireland, but the second most in Australia and third most in the UK, then New Zealand, the USA, Canada, Luxembourg (huh?), Spain and the Netherlands, followed by various other European countries and Argentina! The chief of the name lives in Spain, so I expected that to be relatively well up in the rankings, but Luxembourg???!!! It's a postage stamp of a country to begin with (no offence). Also, my own branch went to England, and then I wound up in the US, so I was obviously already aware that there was a lot of Irish emigration to the UK.

When I plugged in various other Irish names, I found a broadly similar pattern. It seems the largest numbers of Irish emigrated "Down Under", and that after that more went to the UK than the US, which defies conventional wisdom I think, but conventional wisdom is not always correct. To read some sources you would think that most Irish who emigrated went to the US, but it obviously isn't so. Still, there's no doubt that the USA gave the world St. Patrick's Day parades, LOL!

A few words on oddities in the databases concerning names beginning with O' and how they are recorded. Apparently in the Irish records they all appear without the apostrophe, and for New Zealand the term frequency is the same with or without it, so obviously you don't add those together to get a total. OTOH, for all the other countries you would have to manually add together the term frequencies for O' names with and without the ' to get the right number that actually occur.