They are used by people who have less than an ounce of Irish blood in them, to fit into the trend.
I hate that. People that go "Oh, yes, I have Irish heritage. My great-aunt's cousins next-door-neighbour's cat comes from Ireland, which is why I feel fully justified to name my daughter Scoithniamh-Caoilfhionn-Irylynn and lecture people on "my" home country whenever possible."
- Maria