Rose Murphy of Downpatrick

[Yorkyboyl]

Can someone help please with information on a Rose/Rosa/Rosanna Murph(e)y, who I believe would have been born appx 1784. I have very few concrete facts about her other than she married a John Blackburn (Blakeburn ?),  somewhere/sometime,  and lived in Ovingham, Northumberland  having at least 8 children between 1803 and 1826.
   There is a possible death date of 7/7/1862, age 87, in Whickham, County Durham, and I have seen a family tree which shows Her being from 'Donpatrick', Ireland.
   I also came across a Rose Murphy marrying a John Blackburn 5/6/1800 in Whitehaven, but I am lead to understand that this young lady could be Chrstnd 7/9/1783 from Harrington in Cumberland, and was not connected to my search.
    Hope someone out there may be able to help, thanks