My g.g.grandfather was Robert Diffin of Garvaghey a townland between Armagh and Killylea.His wife was Rosanna Turner.By my records their children included James b 1826 John b 1828 Samuel b 1835 Robert b 1840 Martha b 1842 Lavinia b 1843 Rosanna b 1845 Henry b 1846 Jean b 1848. I don't think my records are complete especially for the 1830s.
Rosanna died 19/5/1859 and is buried in Drumsollen C of I churchyard some 3/4 miles from Killylea.Robert died 19/12/1873.
It is worth noting that son John and his family including daughters Margaret b 1854 and Annie b 1859 went to Australia.I understand they changed their names to Devine when they arrived.
I am not sure this is of any help but if you have any questions please contact me