Hi Caren,
I didn't have much luck finding Pat or Marg's burials on rootsireland or on the CD Memorials of the Dead Galway & Mayo
Have you looked at the 1901 & 11 censuses which are free online? There are a couple of possible records which may give a clue to possible death years:
1901: Residents of a House in 1 Laghtanora (Tiaquin, Galway)
SurnameForenameAgeSexRelation to headReligion
FinnertyMargaret58FemaleHead of FamilyRoman Catholic
FinnertyFrancis28MaleSonRoman Catholic
FinnertyDelia22FemaleDaughterRoman Catholic
1911
SurnameForenameAgeSexRelation to headReligion
FinnertyMargaret76FemaleHead of FamilyRoman Catholic
FinnertyFrancis40MaleSonRoman Catholic
FinnertyMargaret36FemaleDaughter in LawRoman Catholic
KellyMaggie6FemaleGrand DaughterRoman Catholic
LarkinMichael41MaleServantRoman Catholic
1911:Residents of a house 3 in Woodquay Belclare Galway
SurnameForenameAgeSexRelation to headReligion
FinnertyPatrick62MaleHead of FamilyRoman Catholic
FinnertyMargaret60FemaleWifeRoman Catholic
FinnertyMichael30MaleSonRoman Catholic
FinnertyMary19FemaleDaughterRoman Catholic
GilmourNorah4FemaleGrand DaughterRoman Catholic
If you could indicate which might be the right ones we can then search cemeteries in that area
Col