Is this the right area for Cranbourne, Dorchester, Quebec???

Mary Ann Murphy B: Sept 1858 in Quebec, Canada was living there until 1881. Her mother was Mary Casey and father John Murphy. Mary ann had one sister, Sarah who moved to RI then to NYC, USA in 1884. Her father, John was born 1821: Roscommon,Ire.His parents were: Brain/Bernard, Murphy and Catherine Cunningham of Roscommon,Ireland. Mary Ann's mother was Mary Casey born: 1830 Wexford,Ireland her parents were: William and Ann Foley also of wexford, Ireland.