Máirín Hughes (née O’Sheehan) was an Irish centenarian who was the oldest person in the country upon her death. Her age has not been validated by LongeviQuest (LQ).
Margaret Hegarty was an Irish-American supercentenarian whose age has been validated by the European Supercentenarian Organisation (ESO). She was the oldest living Irish-born person for the final 5 years of her life
Kathleen Snavely (née Hayes) was a validated Irish-American supercentenarian who holds the record as the oldest validated Irish-born person ever, at the age of 113 years, 140 days.
Katherine Plunket was a validated Irish supercentenarian. She was, at the time of her death, nearly four years older than the next oldest known living person in the world and also was the longest-lived Irish person until Kathleen Snavely (who died in the United States) outlived her age of 111 years, 327 days.