Yours is a common name in my family. My half-brother was Pierce. I think my grandfather was also Pierce. My father's brother, John, had a son, Pierce, my dad's first cousin, of course. He was a sound engineer in RTE. Is that your dad by any chance? I remember meeting him once or twice when I was a small boy in Ireland. My Father, Thomas was very fond of him. If he is your dad, I named my son, John, after your Grandfather (as well as his own, maternal grandfather, also called John.)
Tom Ivory, Philadelphia.