My sister Carol's DNA with 23andMe showed a biological 3rd or 4th cousin connection to a Linda Munroe who reached out to Carol to make a connection. Linda's grandfather was Patrick O'Reilly and great-grandparents were Mary Jane & Hugh O'Reilly. The O'Reilly's lived in Osceola, Ontario. Patrick was born in Cobden, Ontario. These communities are within 20 miles of Haley Station where Grampa Smith was born.
Mary Jane Aughney and Hugh O'Reilly's son, Patrick has an uncanny resemblance to my Grampa Smith.
DNA shows that the common ancestor between Carol and Linda Munroe is 3 to 4 generations, or 3.5 generations once removed. This fits well with either Mary Jane Aughney or Hugh O'Reilly being Carol's great-grandparent, while they are Linda's great-great-grandparents which they are.
Below are pictures of possible brothers (cousins), Adoniram Smith and Patrick O'Reilly

Was Hugh O'Reilly Grampa's biological father? No. Further DNA matches to Aughney's who are only related to the O'Reilly through marriage attest to this.
This left two candidates who could be the biological father of Grampa: one of Mary Jane's brothers, either Luke Aughney (b. 1854) or James Aughney (b. 1856). There's also William Aughney (b. 1858), but since Leah was born in 1848, the 10-year gap didn't seem plausible. Luke and James eventually married sisters, Mary and Bridget Reynolds. Within two years of Grampa's birth, the whole Aughney family dispersed to the USA. Late 1860's, there's evidence that a Patrick Aughney was applying for U.S. Naturalization. If this is our Patrick but he must have returned, as the "Oughney" family can be found in the 1871 Bromley Co., Ontario census.
Even if I had access to the Y-DNA of my paternal male cousins, I would not be able to tell which Aughney brother is my great-grandfather, as the Y-DNAs would be exactly the same as it gets passed down unchanged from father to son. The only possible way to find the correct Aughney brother would be finding descendants of both and comparing which descendants have more atDNA in common with me, although I'm not sure if this would even be a definite.
Luke Aughney
According to Luke's death record, he fell out of bed on February 9, 1937 at St. Joseph's Home, broke his left hip and died on March 25, 1937. He was 80 years old. The informant was an Aughney, 935 Nora Ave., Spokane, Washington. He'd been a farmer for 40 years before retiring and was a widower at death.
Luke married Mary Reynolds, the sister of Bridget Reynolds who was the wife of James A. Aughney, Luke's brother. Mary Reynolds died sometime between 1889-1900.
In January 2025, I made a connection with Kelly Little on Ancestry.ca. She is the Great-great-granddaughter of Luke Aughney and the great-granddaughter of Mike Aughney (see M. J. Aughney above). We are DNA connected and we're a half-3rd-cousin-once-removed related. This, on the surface, shows that Luke is NOT Grampa's father. If he was, Kelly would be my half-2nd-cousin-once-removed.
James A. Aughney
James was born in Ontario in 1856, making him 24 when Grampa Smith was born. Leah Eady would have been 32 - an 8-year age gap.
In the 1910 US Census, James A. is listed with his family, stating that he immigrated to the U.S. in 1880. His obituary says he arrived in the US in 1879. The 1881 Ontario Cencus says he was still in Bromley, Ontario. The 1900 US Cencus says he arrived in 1882.
In April 1882, James crossed the border at Port Huron into Michigan, then travelled to Morton County, North Dakota. On November 3, 1882 his Naturalization papers were filed.

When James was 32, in 1888, he married Mary Reynolds' sister, Bridget Reynolds in Bromley Co., Ontario.
Its thought provoking that James Aughney made an exit out of Ontario to the US in the same year Leah Eady would have been pregnant with Grampa and seemed to returned only to marry Bridget Reynolds before going back to the US. Was this an arrange marriage? Is it possible that Leah and James may have fallen into a relationship that the Aughney's outrightly rejected? She wasn't Catholic and she wasn't Irish.
James and Bridget's children were:
Mary Agnes m. Cantwell (Montana)
Ellen Jane m. Regan (Sacramento, CA)
Anna m. Carney
James Burnard m. Onah (first name) (see WW1)
Stella m. John H. Osborne (dau. Dorothy Connor of Diamond Springs and son Donald N. b. 1925)
On March 29, 1895, James Aughney shows up in the newspaper as a member of a Grand Jury.
Bridget died in 1899 in North Dakota.
In the 1900 US Census, James is living in Morton, North Dakota, widowed, claiming to have been in the U.S.A. 18 years. All the children were born in North Dakota. He has a farm hand whose wife is the housekeeper and they have two small children.
In the 1915 Mandon, Morton Co. census, James is with Anna, James B. and Stella. There's no indication of farm hands or housekeepers. And below is a map of the farms at that time.

I've connected with another Aughney descendant who can actually read DNA results. Below is a chart from GEDMatch she sent to me

Three DNA's compared to mine. (Susan Rogers', her mother's and her sister's). She compared "the cM down to 4 and the SNPs down to 100 because of the large number of generations back to our common ancestor (at least 11)." All four of us share the exact segment on Chr1 and Chr22, and I share the exact segments with Susan and her mother on Chr15, 18 & 21.