Hately Family

[tigces]

Please help
I am trying to find the marriage of James Doyle and Emma Hately, James was born in 1825 Dublin and the first born child Rebecca, I have found for these two was born 12th April 1854.  I have also found the birth certificate for her sister which gives the mother's name as Isabella Hately is this a sister or could it be Emma Isabella?  I also noticed on the younger sister's James signs his name J Doyle rather than put his mark he is carman and on Rebecca's he is a bootmaker.  Could it be a different couple it's Rebecca's I am more interested in.