I've got Gaelic ancestry on both my family branches, more on the paternal side which is 75% Irish and 25% English. One of my immigrant ancestors, a 3rd Great Grandfathers came over in 1852(thank you Great Potato Famines!-there were two not one)from Derry to New York state. His wife's father(my 4 x Great Grand(from Derry to NYS as well) and his 2nd wife arrived in 1837(this is the one who moved West repeatedly and ended up in Montana.
I have 2x Great Grandparents from Limerick, Maurice(pronounced Morris)O'Brien and Mary Ellen Roche who immigrated in 1880. These are ancestors on my paternal grandfather's wife's side.
On my Grandfather's first wife's side, my Great Grandparents, Dennis Timothy McCarthy and Mary Kelleher arrived 1880 and 1904 respectively from County Cork making my paternal Grandmother a first generation American born. Throw in some Healeys, Careys and Desmonds on that branch too going back to "the Old Country".
On my maternal side it's more of a mixture of English, French Huguenot, Scottish, Welch, but there is a smattering of Irish too. I have a Moses O'Drisceoil, born 1689 in Ireland(place unknown)who immigrated to America before 1730. His son, Daniel, was born in Virginia that year and dropped the "O'" from his surname and Anglicized the name to Driskill at some point and he is one of my Patriot Ancestors who supplied troops in the Revolutionary War. So yes, I come from a long line of troublemakers. ;-)
O'Sluggy