My Hopkins ancestors also came from Preban Parish in Co. Wicklow. A number of marriages took place between the Blakes and Hopkins but I have no record of either William Blake or Jane Ireland (another local family).
A Jane Wallace married a William Blake sometime around 1835...could this be your widow Jane Ireland (or the other way round?) ? There was a son Thos Wallace Blake...note middle name and also a son William Ireland Blake...note middle name.
Threre were a lot of other children.
A Jane Wallace Blake of Ballinglen died May 27 1878 at age 65, buried Preban.
All a bit fuzzy, but send me you ancestry going as far back as you can and I will see what if any additional data I can provide.
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