Hi Michael, we would love to help you find out more about the marriage between George Sullivan and Margaret O'Brien around 1884. Do you happen to know what area of Ireland they lived in during this period?
In 1864 civil registration was introduced in Ireland, which is when we started seeing the formal registration of births, marriages, adoptions and deaths. These records have been kept at the General Register Office of Ireland, or GRO
, to this day.
Once Northern Ireland was created in 1921, we saw the creation of GRONI
, the General Register Office of Northern Ireland. This is important, because anyone who lived in one of the 6 counties that would later become part of Northern Ireland between 1864 and 1921 would have had their records stored with GRO, but if they were born or lived in Northern Ireland after 1921, then their records would be with GRONI.
Take a look at this thread with Helpful Research Tips
for more useful info, and if you have any questions, just give us a shout! :)