[justshutupandtakeit]

"Black" Irish were the descendents of Spanish sailors from the Armada who washed up on Ireland's shores or whose ships wrecked there because of the storm which destroyed the Spanish fleet. It was not a real racial designation.
However, the KKK would not like her anyway because most Irish were Catholic.

[teenyelliott]

Black" Irish were the descendents of Spanish sailors

You are correct about the black Irish thing. However, my g g grandma was black. She just happened to be from Ireland.