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I looked on Roots Ireland and found a marriage record in the Aughrim RC parish which is just below Croghan/Killummod/Killucan parish. Do you think this is the record you are looking for? Here is a link to the Aughrim parish register http://registers.nli.ie/parishes/0539
Date of Marriage:28-Nov-1831
Parish / District:AUGHRIM
Husband Michael Connor