Lesley, You may already have this information. The children of Terence Fitzpatrick & Sarah McEvoy of Peel were baptized on 08 Aug 1845. It looks like an epidemic of some kind and they were in danger of death. Their godparents were John Duffy and Margaret Murphy.
Dorothea aged 13yrs
Edward aged 5 and a half years
Mary aged about 9 years
Torrence (Terence) aged 3 years
The next day 09 Aug 1845 Elizabeth aged 16 years.
Another child Thomas son of Lawrence? Torrence? Terrence? & Sarah was baptized 10 Jan 1840 godparents William Hinds and Maria (Mary) Rooney
It would be worth checking deaths at that time to see how many of the children survived.
Hope this helps. There were some Fitzpatricks in Douglas if you would like the dates of their bapisms or marriages let me know.
Marie Radcliffe