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).
O'Moore's uncle Rory O'More, a prominent nobleman in Ireland, opposed the English during the Tudor period. In 1556 Queen Mary I confiscated the O'Mores' property and created "Queens County," which is now modern-day County Laois.