Margaret (born abt 1831) and her sisters, Mary and Lucy left County Armagh in Northern Ireland and arrived in New York City sometime before 1850. Their mother, Margaret also emigrated to the US, but I have found no proof that their father, Robert Oakman, ever joined them. He was a medical doctor, deceased by the time Margaret married husband John Newman in November 1859. Whether he had died prior to them emigrating or whether he died in New York is not known.
Margaret and John Newman had the following children: Mary, Ella, John and Robert. John was a Typesetter/Compositor and the family lived mostly in the Brooklyn area of New York City.