The bait worked!
I have Emily (bapt 1831). As JC says, the IGI gives her parents as James Joughin and Cathe Crow. The Cathe must be a mistake for Margaret, as James’s then wife was Margaret, as well as his second wife. The children before and after have mother Margaret. James is descended from the main Joughin line in Andreas, which has now been taken back to Christopher Joughin and Catherine Christian, who lived in the 17th century.
The only subsequent history that I have for Emily is the 1841 census that JC quotes, so I will gladly give this woman to be married. I have not found the marriage in the IoM, but there was an Emily Joughin married in the December quarter of 1865, in Liverpool Registration District, 8b 155. If someone good with English BMDs would like to see if there was an Edward Keig who married in the same quarter with the same reference, that will be them. A copy of the certificate would make sure.
The Preston census could well be her.
Were there children? If so, would they fit with the 1865 marriage? By then she would be about 34, so there would not be time for a big family.
I go along with the 1851 and 1861 censuses. The 1851 was at 30 Great Nelson Street. Yes, Christ would be Kirk Christ Lezayre, the parish church of Lezayre, the parish where Margaret Crowe was born. There is also Kirk Christ Rushen.
This is not to do with your Emily, but you will see the other Emily, 9-year-old granddaughter of James in the 1861 census. I have not found her baptism, but when she married John Kelly at Braddan in 1873 she gave her name as Emily Christian Joughin and her father’s as Robert Joughin, miller. This Robert, the 12-year-old in the 1841 census, was a journeyman miller at St. Helena Cottage, Ballaughtin, Braddan in 1851. He was killed later that year in an accident at Ballaughtin Mills, as his headstone in Braddan New Yard records. This was gone into on this board in September 2007. I think it was Sue that conjectured that Emily, born after her father had been killed, was the daughter of Margaret Christian, who would probably have married Robert Joughin, perhaps before their daughter’s birth, but instead married Robert’s father James, and provided him with one more child, Robert James Joughin, b 1859 and named after his deceased half-brother and their father. I have an idea that there was some continuing connection between Emily (Mrs. Kelly) and her step-grandmother Margaret, but that nowhere does Margaret admit to being Emily’s mother, or vice versa.