Kathleen:
Welcome to Ireland Reaching Out!
Finding RC records in Co. Mayo pre-1840 is difficult. I checked the subscription site Roots Ireland and the earliest Thomas O'Hara baptismal record was in 1825 in Swinford. See transcription below. There was an 1831 marriage record to a Mary in Aglish parish but that marriage would be too early for someone born about 1821. See below. No maiden name show for the wife. The next Thomas O'Hara marriage was in 1868. I also searched for baptismal records for children of a Thomas O'Hara and wife Mary and the only one that made sense was an 1846 Anthony O'Hara record. See below. The next record was in 1868. Do you have any additonal family information?
Roger McDonnell
Name:Thos O HaraDate of Birth:
Date of Baptism:10-Feb-1825Address:UnknownParish/District:KILCONDUFF/SWINFORDGender:MaleCountyMAYO
Denomination:Roman Catholic
Father:Jas O HaraMother:Rose ConnelOccupation:
Sponsor 1 /
Informant 1:Edmd O HaraSponsor 2 /
Informant 2:Anne O Hara
Date of Marriage:24-Jul-1831
Parish / District:Aglish RC parish
County:Co. Mayo
Husband ThomasO Hara
Wife MaryNl
Name:Anthony O'HaraDate of Birth:
Date of Baptism:07-Apr-1846Address:Bally-GronyParish/District:CROSSMOLINAGender:MaleCountyMAYO
Denomination:Roman Catholic
Father:Thomas O'HaraMother:Mary HeneganOccupation:
Sponsor 1 /
Informant 1:John GallaspySponsor 2 /
Informant 2:Sibby Moran