Thank you very much for that information! I had only found an 1899 death record (with no detailed information) and I knew that he was not on the 1901/1911 censuses (there were only 3 sons and a daughter listed). But this is definitely him in Graigue, Queen's (Laois). And the fact that he is listed as a widower is consistent as I believe that his wife Norah Feeley died in 1884.
If you're up to another question, it involves his father William. Starting in 1828, there are several children born to a William Ringwood and Mary Blake in Graigue. Then William Ringwood and Mary Holohan had only 2 children born in the mid-1840's in Graigue (Joseph being one of them). And then in the 1850's there are two more children born in Graigue to William Ringwood and Jane Rowe. None of the children have the same name. Based on some DNA matches, I strongly suspect that it is the same William who married Mary Blake and then Mary Holohan. I don't have anything specific on the Jane Rowe marriage, but she might have been a third marriage -- or maybe it's just a different William. Is there any way to find out if there are 1,2, or 3 Williams involved in these marriages and births? Also, to make it maybe even a little stranger, I also found a couple of children born in Dublin in the early 1820's to a William Ringwood and a Mary Blake -- but I don't know if it's the same person and if it is, I have no idea why he would have been in Dublin. For now, I am assuming it's just a strange coincidence, but who knows.
I also do have a possible baptismal record for William -- 25 Nov 1806 to Arthur Ringwood and Margaret Delany in Graigue. However, I know that William was a common name, so I'm not sure on that -- but the age and location do fit At any rate, the Mary Blake / Mary Holohan marriages and children are my primary question (if possible).
But again, I definitely appreciate your proactive research.