www.rootsireland.ie/ has 5 John Shields (+ surname variants) Derry baptisms 1825 + - 10 years; 2 are R C:
Name:John O'ShielDate of Birth:
Date of Baptism:21-May-1826Address:
Parish/District:LONG TOWERGender:MaleCountyCo. Derry
Denomination:Roman Catholic
Father:Manasses O'ShielMother:Ann O'DoghertyOccupation:
Sponsor 1 /
Informant 1:Francis ByrneSponsor 2 /
Informant 2:Mary Byrne
Name:John ShieldsDate of Birth:
Date of Baptism:26-Jul-1831Address:GlebeParish/District:TAMLAGHT FINLAGANGender:MaleCountyCo. Derry
Denomination:Church Of Ireland
Father:James ShieldsMother:Martha Mcfarland
Name:John SheilDate of Birth:
Date of Baptism:29-Apr-1832Address:DrumParish/District:DUNGIVENGender:MaleCountyCo. Derry
Denomination:Roman Catholic
Father:Michael SheilMother:Mary BradlyOccupation:
Sponsor 1 /
Informant 1:James KaneSponsor 2 /
Informant 2:Biddy Sheil
Name:John ShielsDate of Birth:
Date of Baptism:10-Mar-1833Address:
Parish/District:CUMBER LOWERGender:MaleCountyCo. Derry
Denomination:Church Of Ireland
Father:Edward ShielsMother:Bridget Cairns
Name:Johnnie ShielsDate of Birth:08-Nov-1834
Date of Baptism:27-Nov-1837Address:BallylishParish/District:PORTSTEWARTGender:MaleCountyCo. Derry
Denomination:Presbyterian
Father:John ShielsMother:Elizabeth Beers
IF he applied the Irish naming pattern in naming his children, his first son & second daughter would be named after his own father & mother
Col