Hi Joanne,
The marriage record from rootsireland has his father's name as Joseph:
Date of Marriage:04-Jun-1860
Parish / District:NEWTOWNABBEY
County:Co. Antrim
Husband
WifeName:SamuelMcNeilly
ElizabethHewittAddress:Straidnahannagh
Denomination:Church of Ireland
Church of IrelandOccupation:LABOURER
Age:21
20Status:Bachelor (Previously unmarried)
Spinster (Previously unmarried)
Husband's Father
Wife's FatherName:JosephMcNeilly
JohnHewittAddress:
Denomination:
Occupation:LABOURER
FARMER
Husband's Mother
Wife's MotherName:
Address:
Denomination:
Occupation:
Witness 1
Witness 2Name:SamuelMenelly
MarthaScottAddress:
Notes:
Church: CARNMONEY Church of Ireland
BY BANNS REV C P REICHEL.
Name:Samuel NeillyDate of Birth:15-Aug-1837
Date of Baptism:17-Sep-1837Address:
Parish/District:FITZROY PRESBYTERIAN CHURCHGender:MaleCountyCo. Antrim
Denomination:Presbyterian
Father:John NeillyMother:Ann
This baptism record is the right year & names John & Joseph are similar so perhaps it was a transcription error - all to common - that explains the difference?
Col