MacDermott Roe, Mary (Máire) (d. 1739?), patron of Turlough Carolan (qv), may have been born in the 1670s, and was a daughter – possibly eldest daughter – of John Fitzgerald (d. p. 1717), captain in the army, who had been transplanted to Connacht and confirmed in the possession of an estate at Turlough, near Castlebar, Co. Mayo, by the act of settlement (1677). He married (1669) Elizabeth, daughter of Sir John Browne of the Neale, Co. Mayo, 1st baronet; John Browne (qv) (d. 1712) was her brother. There were six sons and five daughters of the marriage. Nothing is known of Mary's life until she married Henry Baccach MacDermott Roe, of Alderford or Ballyfarnon, Co. Roscommon. His family, like the Fitzgeralds, were catholic gentry, and were connected to others of Old English and Irish descent in the west of Ireland.
Mary MacDermott Roe is remembered for her kindness to the poet and musician Carolan, whose father was employed by her husband. It is said that she had the boy taught how to read and write, and after he became blind, probably in his teens, she arranged for one of the MacDermott Roe family to teach him how to play the harp. When he was 21, she provided him with a horse and a servant, so that he could travel from one patron's house to the next, to make a living as a bard and poet in the traditional manner. For most of his life she welcomed his visits, and he composed songs in honour of members of the family. However, her eldest son, Henry, married against her wishes, and she blamed Carolan for supporting him, and also for writing a song in honour of the newlyweds. For some time there was a rift between them, but she eventually forgave the musician, and when on 25 March 1738 Carolan died, it was in his patron's house at Alderford. He was buried in the MacDermott Roe vault in Kilronan churchyard. Mary MacDermott Roe is said to have died in 1739.
She and her husband, who seems to have predeceased her by some years, had five sons. One became a protestant, and was a lawyer. Another, Thomas, was catholic bishop of Ardagh 1747–51.