Mary Catharine Singleton (born 1940) (b. 1940) Parents Percival William Singleton Evelyn Nepean Children Dominic Rupert O'Connor Benedict O'Connor Christopher Rupert O'Connor Gregory O'Connor Siblings Margaret Elizabeth Singleton John Dominic St. Vincent Nepean Singleton Ruth Angela Singleton Felicity Maud Singleton Bernadette Lucy Singleton Cecilia Teresa Singleton Gregory St. Vincent Nepean Singleton Partners Michael Villers Forbes O'Connor