Patrick’s farm in Tamnymullan is listed in Griffiths Valuation 1859. He had plot 12 which was around 8.5 acres. (Up a lane off the modern Moneysharvan Rd. The land is still farmland but the buildings appear to have gone, judging by Google Earth). There was a James Marron nearby on plot 17Bb who had a labourer’s cottage. A relative perhaps?
The Valuation Revision Books for Tamnymullan show Patrick remaining as tenant until 1888 when it changed to Bernard Marron. In 1898 it changes again to Thomas Heaney. So did Patrick die around 1888, and was succeeded by his son Bernard and who gave up the farm around 1898?
Spotted the death of Patrick’s daughter Rosanna in 1886:
And Patrick’s wife Bridget in 1890:
1831 census lists a Patrick M with a household of 3 males and 3 females, all RC.
Nearby were 4 houses occupied by Hugh, Rose, Matthew & James Marron. Presumably relatives.
Maghera RC baptisms & marriages only start in 1841 so you will struggle to get back to earlier generations.