It’s Saint Patrick’s Day, and I was asked how much Irish ancestry I have. Surprisingly little, it turns out. Like, less-than-one-percent little. (By Ancestry DNA’s reckoning.) All my “Irish” ancestors — such as my McNeelys — were Scots-Irish and are lumped in with my 19% Great British ancestry.  As far as I can tell, the tiny Irish Irish percentage is attributable to my great-great-great-great-great-great-grandfather Micajah Casey (circa 1745-1799, Wayne County NC) via J. Buckner Martin (1868-1926).