My wife gave me the "Rockhead" handle. My parents didn't give me the traditional Irish spelling of "Sean" as they were worried that people would pronounce it "Seen". I ended up with "Shaun" rather than "Shawn". Back then (40+ years ago) Shawn was more of a girl's name. Anyhow, I am a mix of Irish from my mother's side and Welsh from my father's side.
With a middle name of "Patrick" I've got the full blown Irish thing happening!