Bulgaden- Fitzgibbon(s) and Sullivan

Re:James Fiztgibbons and Marie Margaret Sullivan

Can anyone tell me who their parents were??

Marriage record:

Marriage Record
Date of Marriage:    13/02/1841
Parish / District:    BULGADEN         County:    Co. Limerick
    Husband        Wife
Name:     James    Fitzgibbon        Maria    Sullivan
Address:             
Denomination:     Roman Catholic        Roman Catholic
Occupation:             
Age:             
Status:             
    Husband's Father        Wife's Father
Name:         Fitzgibbon            Sullivan
Address:             
Denomination:             
Occupation:             
    Husband's Mother        Wife's Mother
Name:                     
Address:             
Denomination:             
Occupation:             
    Witness 1        Witness 2
Name:     James    McCarthy        Catherine    Sullivan

=========================================================================

My GG Grandmother was their daughter Kate :

Birth/Baptism record:

Church Baptism Record for: Kate Fitzgibbon

 Church Baptism Record
Name:    Kate Fitzgibbon    Date of Baptism / Birth:    08/01/1841
Address:    ?    Parish / District:    BULGADEN
Gender:     Unknown    County    Co. Limerick
        Denomination:    Roman Catholic
Father:    James Fitzgibbon    Mother:    Maria Sullivan
Occupation:        
Sponsor 1 /
Informant 1:    John Sullivan    Sponsor 2 /
Informant 2:    Joh. Sullivan

=========================

I think Catherine's parents must be John & Catherine according the the witnesses listed above but  I am not sure?

Please help:)

Jila