David,

I found a record on Irishgenealogy (free)- Catholic Records. I know you are looking for records before 1860 but this might help.

Area - CORK & ROSS (RC) , Parish/Church/Congregation - ROSSALETTIRI & KILKERAUNMOR (ROSCARBERY & LISSEVARD)

Baptism of PAT MAHONY of TANY D LANE on 23 March 1871

NamePAT MAHONY

Date of BirthN/R N/R N/R

AddressTANY D LANE

FatherMICHL MAHONY

MotherKATE DONOVAN

Further details in the record

Sponsor 1JAS BARRY

Sponsor 2ELIZA DONOVAN

Recorded Parochial AreaROSSALETTIRI & KILKERAUNMOR (ROSCARBERY & LISSEVARD)

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Maybe Patrick's parents?

Marriage of MICHAEL MAHONY of N/R and CATHUM DONOVAN of N/R on 12 February 1861

HusbandWife

NameMICHAEL MAHONYCATHUM DONOVAN

AddressN/RN/R

OccupationN/RN/R

FatherN/RN/R

MotherN/RN/R

Further details in the record

Recorded Diocesan AreaCORK & ROSS

Recorded Parochial AreaLISLEE, ABBEYMAHON & DONOUGHMORE (BARRYROE)

Husband DenominationRC

Wife DenominationRC

Witness 1PATEN DONOVAN

Witness 3MLL HURLEY

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Regards- Mary

David,

I found an article about Dennis Mahoney on Wikipedia

Dennis Mahony - Wikipedia

Regards- Mary

Thank you for your reply. My great great grandmother was Catherine Mahoney born in Rosscarbery between 1833-1840. Her father was a Denis Mahoney. I believe that the Mahoney’s of Rosscarbery are all related in someway. 

 David