I descend from Edward Ryan, brother to your ancestral Ryan sister.
We seem to have much of the same information, although I haven't been able to track down sister Catherine, and you're missing a couple of sisters - Johanna and Margaret. I also have not found anything to substantiate Johnny "The Gent" Ryan. The family patriarch appears to have been Edward (1799 - 1871) who was married to Catherine Phalen / Whalen (1799-1880). Several of their children are found on the Rathgormack (County Waterford) Parish Records.
I'd very much like to communicate and see if we can compare notes. You can reach me directly at: firstname.lastname@example.org