Hi Cyril, When was your G Grandmother married ?
My GG Grandmother was Sarah Boyle (ms McElhinney + Var)
she was b 1820 and died 1875. I'm still unsure of what denomination my GG G/Mother was before she married James Boyle (all their children where RC) This family lived in Killhill,Bellanascaddan,Nr Letterkenny,Kilmacrenan Parish.
I've a list of McElhinney + B/M/D's - perhaps I can help you out?
Anne