Hi, AVOPATTO,
I think it's very possible that the later Johanna Barry that you mention was the young second wife of my great great great grandfather, John Walsh (b. 1808). They married in Ballymacoda, Ladysbridge (very close to Carrigtwohill) on October 13, 1839, and they had three children in Ballymacoda: John, b. Jan. 28, 1841; Mary, b. Feb. 2, 1843, and Honora, b. August 2, 1848. They moved to Lagro, Wabash, Indiana, U.S.A. shortly after. John Walsh died in Indiana and then Johanna and the kids moved to Janesville, Wisconsin to be near John's son from his first marriage, my great great grandfather William Walsh. They are all buried in Janesville, Wisconsin, including Johanna Barry Welch. (Walsh got changed to Welch in America).
The reason I think our Johanna Barry is from Carrigtwohill is because there is a Johanna Barry born in Carrigtwohill on July 21, 1821. It matches the year of Johanna's death on her death certificate and gravestone in Wisconsin. (He would have been about 30 and she about 18 when they married!)
Of course I can't be certain because there are no records for Ballymacoda Ladysbridge from before 1836, so I don't know if there was another Johanna Barry born there the same year!
I'm seeking information about John's first wife, because she was my ggg grandmother, but I'm having trouble finding anything for sure. There were a couple of women married to John Walshes who gave birth to William Walshes at the right time in Carrigtwohill as well. But of course I don't have the records for Ballymacoda.