I have a Darby Carew married to a Catherine Power (married Feb 1818) with a daughter Mary baptized on Jan. 28, 1821 in the Catholic diocese of Cashel and Emly. Parish of New Inn. There were other children baptised later: John in 1823, Thomas in 1826, Pierce in 1828, Johanna in 1831, Darby in 1835, Anne in 1838 and Mary in 1840. Not sure why 2 Mary's are listed. Possibly a different first or second name (not uncommon) or the first Mary was deceased.
Also have a Mary Carew baptized in 1836 as a daughter of Michael Carew and Honora Hayes (married Apr 1815). Same Parish. Siblings in this marriage are Ellen (1820), John (1823) and Michael (1828).