Seamus Byrne
Seamus Joseph Byrne is an Irish former international rugby union player.
Byrne was raised in County Kildare, and is a brother of Ireland international Frank Byrne.
A wing three-quarter, Byrne is noted as being the first and only Ireland player to have scored a hattrick on international debut, a feat he achieved in a 26–8 win over Scotland at Edinburgh in 1953. He followed it up with his fourth career try in his next match in Swansea, but received only one further Ireland cap.