Hello Stephanie
A baptism transcription from the Find My Past (FMP) website shows the baptism of a Mic (Michael) Cassidy in the Drumconrath Catholic Parish, County Meath, on 25 January 1813. Michael's parents are James Cassidy and Cath (Catherine) Kent.
Michael may be your Catherine's brother.
A transcription of the baptism is below:
First name(s) Mic
Last name Cassidy
Baptism year 1813
Baptism date 25 Jan 1813
Parish Drumconrath
Alternative parish names Drumcondrath, Drumconra, Loughbracken
Diocese Meath
County Meath
Country Ireland
Father's first name(s) James
Father's last name Cassidy
Mother's first name(s) Cath
Mother's last name Kent
Archive National Library of Ireland
Register type Baptism
National Library of Ireland register http://registers.nli.ie//registers/vtls000635146#page/1/mode/1up
Record set Ireland Roman Catholic Parish Baptisms
Category Birth, Marriage, Death & Parish Records
Subcategory Parish Baptisms
Collections from Ireland
Source: Find My Past
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A copy of Michael's original baptism record, from the National Library of Ireland, shows that his godmother was Mary Hammond. No godfather is recorded.
You can access the Drumconrath Catholic Parish baptism register at the following link from the National Library of Ireland: https://tinyurl.com/8pyf4pkk
There are two facing pages to the register. Michael's baptism is on the right-hand page, 4th baptism down from the top.
You'll have to enlarge the page to get a better view of the baptism.
I didn't find the baptisms of any more children of James Cassidy and Catherine Kent, nor did I locate a marriage record for James or Catherine.
But, I did find a James Cassidy recorded in an Irish agricultural land record called the Tithe Applotment Books at the National Archives of Ireland website, which shows that he was a farmer in the townland of Ballyhoe, Civil Parish of Drumcondra, County Meath. This record is from the year 1830.
A copy of the original Tithe Applotment Book entry for the townland of Ballyhoe can be accessed at: https://titheapplotmentbooks.nationalarchives.ie/reels/tab//004587433/004587433_00704.pdf
The entry for James Cassidy is number 145 on the page.
You can search the Tithe Applotment Books at: https://titheapplotmentbooks.nationalarchives.ie/search/tab/home.jsp
Based on the information you provided to the Ireland Reaching Out Message Board, I located the Drumconrath Catholic Parish marriage record for John "Lanen" and Bridget "Casedy" at the FMP website.
They were married in February of 1844, but the transcription does not give a day in February when the marriage took place.
See the FMP transcription below:
First name(s) John
Last name Lanen
Marriage year 1844
Marriage date ? Feb 1844
Parish Drumconrath
Alternative parish names Drumcondrath, Drumconra, Loughbracken
County Meath
Diocese Meath
Country Ireland
Spouse's first name(s) Bridget
Spouse's last name Casedy
Archive National Library of Ireland
Register type Marriage
Archive / microfilm reference Microfilm04184-02
National Library of Ireland register http://registers.nli.ie//registers/vtls000635147#page/1/mode/1up
Record set Ireland Roman Catholic Parish Marriages
Category Birth, Marriage, Death & Parish Records
Subcategory Parish Marriages
Collections from Ireland
Source: Find My Past
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A copy of the original marriage record from the National Library of Ireland shows that the witnesses to the marriage were James Carolan, Patrick Mahon and others.
The marriage is the second entry down from the top of the left-hand marriage register page, which you can access at: https://tinyurl.com/58rs887d
Drumcondrath is the spelling of the Catholic Parish. The Civil parish is spelled Drumcondra.
The IreAtlas Townland Data Base shows the names of the towns located in the Civil parish of Drumcondra, including the townland of Ballyhoe: https://tinyurl.com/uvfcmxzx
Circumstantial evidence, based on the Tithe Applotment Books, points to the townland of Ballyhoe, Civil Parish of Drumcondra, as the home of your Cassidy ancestors.
With Kind Regards,
Dave Boylan
SOURCES
Find My Past
National Library of Ireland
National Archives of Ireland: Tithe Applotment Books
IreAtlas Townland Data Base