O'Moore's uncle Rory O'More, Lord of Laois, had fought against the English during the Tudor conquest of Ireland. In 1556 Queen Mary I confiscated the O'Mores' lands and created "Queens County" (modern-day County Laois).
Rory O'Moore's relative, a noble lord named Rory O'More, resisted the English during the Irish conquest under Queen Mary in 1556. The queen then took control of the O'Mores' land and created "Queens County," which is now known as County Laois.