Conversation so far:
Where did Donnie Iris grow up?
Dominic Ierace was born in New Castle, Pennsylvania, but grew up in Ellwood City, Pennsylvania.
Did he go to school?
While attending Slippery Rock State College, Ierace formed a band called the Tri-Vels.
Was he an only child?
CANNOTANSWER.
How did his first band Tri-Vets do?
they renamed themselves Donnie and the Donnells.
This band in both incarnations played R&B and pop rock covers at fraternity parties and lasted from about 1961 to 1964.

Question: Why did they split up?
Self-contained rewrite: Why did Donnie and the Donnells split up?