[Eric in the Ozarks]

My grandfather was Northern Irish and looked very much like an Irishman. I have the so called Celtic disease, easily managed by donating blood three times a year.
Also Swede, Scot and Welsh mixed in for good measure.

[Aliska]

I've got some surnames that could be Irish like Harper but presume Scots-Irish or just Scots. That's interesting about that disease and how you manage it. Surely you have some from the Continent?

DNA requires some faith to believe 100% but it's being so widely accepted in legal disputes. I think there have been some errors though.