Hi Brian
Looks convincing given that the mother's name is right.
As far as the church goes, if you click on Find My Parish at the top of this page and enter Oldcastle you'll be able to post to those experts & ask about churches.
The marriage record above is very poor - often the occupation is included as well as groom & bride's fathers!
None of the other records - Tithes, Griffiths & Censuses have occupations.
I can help with siblings though: (however father's occupation is omitted in all of thses also!!)
Name: Mary Kiernan Date of Birth: Date of Baptism: 06-Jul-1846 Address: Parish/District: Oldcastle Gender: County Co. Meath Denomination: Father: Michael Kiernan Mother: Bridget Coyle Sponsor 1 / Informant 1: Fagan Catherine
Name: Jane Kiernan Date of Birth: Date of Baptism: 04-Aug-1843 Address: Parish/District: Oldcastle Gender: County Co. Meath Denomination: Father: Michael Kiernan Mother: Bridget Coyle Occupation: Sponsor 1 / Informant 1: Markey Peter Sponsor 2 / Informant 2: Keeffe Mary
Name: Elizabeth Kiernan Date of Birth: Date of Baptism: 20-May-1840 Address: Parish/District: Oldcastle Gender: County Co. Meath Denomination: Father: Michael Kiernan Mother: Bridget Coyle Occupation: Sponsor 1 / Informant 1: Kiernan Philip Sponsor 2 / Informant 2: Plunket Catherine
Name: Michael Kiernan Date of Birth: Date of Baptism: 25-Apr-1832 Address: () Parish/District: Oldcastle Gender: County Co. Meath Denomination: Father: Michael Kiernan Mother: Bridget Coyle Occupation: () Sponsor 1 / Informant 1: Coyle Patrick Sponsor 2 / Informant 2: Smyth Catherine
Col