Henry's relative?
Mcnabb Joseph 1774 — 1816 British Army Pensioners - Royal Hospital Kilmainham, Ireland, 1783-1822 Aughagore, Mayo, Ireland
It was a very small place so I would say almost certainly a relative.
As to parish records for Aughagower? Afraid I'm out of my depth when it comes to Irish records - all I know (as you have probably found out) that coverage of parish records is very poor, especially early ones, and those online mainly tend to be Catholic records. The earliest records I can see referred to, but not online anyway, is from 1828.
Annette
