Mila,the only births I could find were not from Offaly.
Robert Ritchie: birth 1799,1800,1804 all co Antrim
Eliza McCracken: 1804 co Antrim 1815 co Monaghan
do you have anything else on either of them? I did not locate a marriage for them.If Eliza was born in one of these two counties more than likely she was married there.I could find no marriage especially in co Down.Kim