Could any kind person do a look up for me please?

I am trying to find my grandparents births and marriage. They lived in Dublin.In1922 they were living at Charlemont Mall with three children Frank, Joe and Sarah (my mom).The last child Sadie? came later. My nan was Sarah Jane Murphy (nee Smith) and he was Patrick Murphy. i do not know if Sarah was Irish, and although I have tried Irish web sites I haven't got anywhere. If anyone could help I would be most grateful. thanks Believe Patrick died around 1954 and Sarah possibly married again