Here’s a link to the O’Kane - McCallion marriage (which I provided in your thread on the McCallion side of the family. I mentioned there that William John was a widower):
https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1891/10666/5886831.pdf
I cannot find a marriage certificate for William John in Ireland pre 1891, nor a death certificate in Ireland for any likely first wife. Given that his daughter was born in the USA c 1888, my guess is that he married there c 1887, and that his wife died there too, whereupon he came back to Ireland with his daughter, sometime around 1890.
He died on Long Island. Perhaps his first marriage might have been in that general area too?
The 1891 marriage certificate tells you that Mary lived in Ballinderry and that her father Archy O’Kane was a farmer. They married in Ballinderry chapel so it was likely the O’Kane family church.
This looks to be Mary Ann O’Kane’s family in the 1901 Irish census. Note that one of the McCallin children was staying there:
https://www.census.nationalarchives.ie/pages/1901/Londonderry/Salterstown/Ballinderry/1533372/
Here’s her father’s death in 1885:
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1885/06281/4799760.pdf
Family in the 1911 census. Again 2 McCallion children staying there:
https://www.irishgenealogy.ie/files/civil/deaths_returns/deaths_1885/06281/4799760.pdf
Here’s Archy’s probate abstract.
Probate of the Will of Archy O'Kane late of Ballinderry County Londonderry Farmer who died 16 August 1885 granted at Londonderry to Francis O'Kane of Ballinderry the Son.
The will itself is on-line on the PRONI wills site and in it he leaves most of his property to his wife Nancy, plus £50 to daughter Catherine. He also wishes his son Archy to be provided for the rest of his life “so long as the place remains in possession of my family.” Son Francis was appointed one of the executors.
Here’s his wife’s probate abstract. (Note that the names Anne & Nancy are interchangeable in Ireland):
Probate of the Will of Anne O'Kane late of Ballinderry County Londonderry Widow who died 21 May 1906 granted at Londonderry to Francis O'Kane and John M'Cusken Farmers.
The above will is not on-line but should be held in PRONI in paper format. It can be seen there free, or you can pay PRONI to copy it.
I found these two probate abstracts relating to O’Kane from Ballinderry:
O'Kane Sarah of Ballinderry county Londonderry widow died 6 August 1939 Probate Belfast 8 August to John O'Kane farmer. Effects £127.
O'Kane John of Ballinderry Ballinderry Bridge Cookstown county Tyrone retired farmer died 22 December 1955 at Mid Ulster Hospital Magherafelt county Londonderry Probate Belfast 20 March to Gerald McNally auctioneer and Thomas O'Kane carpenter. Effects £143 9s. 2d.
There were 2 other Kane/O’Kane families farming in Ballinderry and they probably relate to this family, who are in turn probably distantly related to Mary Ann’s family:
https://www.census.nationalarchives.ie/pages/1901/Londonderry/Salterstown/Ballinderry/1533380/
https://www.census.nationalarchives.ie/pages/1911/Londonderry/Salterstown/Ballinderry/614080/
Probably worth mentioning that O’ & Mc prefixes to Irish names were detachable and people often dropped them and then used them again later at whim. So Sarah is Kane in the 1901 & 1911 censuses but O’Kane on her death certificate.
