Michele:
Welcome to Ireland Reaching Out!
The 1852 Griffiths Valuation head of household listing does not show a Timothy Neville in Killeagh civil parish. The neighboring civil parish of Ardagh does show a Timothy Neville Sr. and Jr. in Carriganass townland. People in Ardagh civil parish also attended Killeagh RC parish so it is a good possibility that your family was from Carriganass. Now the Timothy Jr. shown in the Griffiths would not be the Timothy born in 1838 but likely his father and the Sr. would be his grandfather.
Looking at the subscription site Roots Ireland, I found baptismal records for two younger brothers of Timothy. See transcriptions below. Roots also had a transcription of the March 3, 1835 marriage record for Timothy Neville and Mary Magrath. See below.
The 1901 census does show four Neville households in Carriganass http://www.census.nationalarchives.ie/pages/1901/Cork/Ardagh/Carriganass/
At the free site www.irishgenealogy.ie ; I located an 1881 death record for a married Timothy Neville in Carriganass with an informant Mary. Likely your ancestor https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1881/06437/4849649.pdf
This may be the death record for Mary Magrath Neville in 1909 https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1909/05458/4527563.pdf
Let me know what questions you have.
Roger McDonnell
Name:Henry NevilleDate of Birth:
Date of Baptism:30-Oct-1843Address:
Parish/District:KILLEAGHGender:MaleCountyCo. Cork
Denomination:Roman Catholic
Father:Timothy NevilleMother:Mary MgrathOccupation:
Sponsor 1 /
Informant 1:John Neville Sponsor 2 /
Informant 2:Catherine Magrath
Name:Richard NevilleDate of Birth:
Date of Baptism:17-Nov-1850Address:
Parish/District:KILLEAGHGender:MaleCountyCo. Cork
Denomination:Roman Catholic
Father:Timothy NevilleMother:Mary MagrathOccupation:
Sponsor 1 /
Informant 1:Thomas Long Sponsor 2 /
Informant 2:Honora Barrett
Date of Marriage:03-Mar-1835
Parish / District:KILLEAGH
County:Co. Cork
Husband TimothyNeville
Wife MaryMcGrath
