The daughter of David Aikenhead, a physician, member of the
Anglican Church of Ireland, and Mary Stacpole, a
Roman Catholic. Her grandfather, also named David Aikenhead, was a Scottish gentleman who relinquished his military profession, married a Limerick lady, Miss Anne Wight and settled in Cork. Mary was baptised in the
Anglican Communion on 4 April 1787. Mary was quite frail and probably considered to be asthmatic and it was recommended that she be fostered by a nanny called Mary Rourke who lived on higher ground on Eason's Hill, Shandon, Cork. It is thought that Mary was secretly baptised a Catholic from this early age by Mary Rourke who was a devout Catholic. Her parents would visit every week until 1793 when her father decided he wanted her to rejoin the family in Daunt's Square. The Rourkes also joined the family and worked as servants to the family. By the early 1790s Dr. Aikenhead had become interested in the principles of the
United Irishmen. On one occasion
Lord Edward Fitzgerald disguised as a
Quaker sought refuge in the Aikenhead home. He was enjoying dinner with the family when the house was surrounded by troops with the sheriff at their head. The visitor managed to disappear and reach safety across the river. The house was searched but because of the loyalty of his apprentices who knew and kept the doctor's secret, no incriminating documents were found. In 1808, Mary went to stay with her friend Anna Maria (born Ball) O’Brien in Dublin whom she had met in Cork. Here she witnessed widespread unemployment and poverty and soon began to accompany her friend in visiting the poor and sick in their homes. She was active in works of charity but she had failed to find a religious institute devoted to charitable work. She shared this idea with
Archbishop Murray,
Bishop Coadjutor of
Dublin who was a friend of O'Brien. Murray returned later and said that he would bring a French order to Ireland if Aikenhead would lead it. To prepare for this task she became a novice from 1812 to 1815 in the
Convent of the Institute of the Blessed Virgin at
Micklegate Bar,
York. In 1831 overexertion and disease shattered Aikenhead's health, leaving her an invalid. Her activity was unceasing, however, and she directed her sisters in their heroic work during the plague of 1832, placed them in charge of new institutions, and sent them on missions to France and in 1835 to Australia. On 23 January 1834
Archbishop Daniel Murray and Mother Aikenhead founded
St. Vincent's Hospital. She died in Dublin, aged 71, having left her institute in a flourishing condition, in charge of ten institutions, besides innumerable missions and branches of charitable work. She is interred in the cemetery attached to St. Mary Magdalen's, Donnybrook. ==Cause for canonisation==