Mary (Ready) Ryan's obituary stated she was from County Mayo. From the 1860 United States Census, she had 3 sisters and 1 brother. Could this record from Burriscarra, Tuam, Mayo be her? I found a baptism record for Eleanor Ready from the same parish, but none for the other siblings. Parents' names come from sibling Anna (Ready) Kirby's death record.
https://www.findmypast.com/transcript?id=IRE%2FPRS%2FBAP%2F6881197