Why is it that everyone seems to have such trouble tracing their Glenny ancestors? :)
Well, I've found some additional info that may or may not prove useful to someone and may or may not connect to my Glennys (hopefully someone will be able to make the connection).
To refresh: I am looking for a James GLENNEY/GLENNY who was born about 1816 in either Ireland or Scotland. He married Margaret HAZLETT in Ireland (unsure of date--it was most likely earlier). One of their children was William George Glenney who was born in Ireland or Canada about 1845, 1847, or 1848 (I've seen all three years listed as the birth year on various documents). They were in Ontario, Canada by 1852. William left Canada for Illinois and then Iowa during the late 1860s and was in Hardin Co., IA by 1870. He married in Marshall Co., IA in 1874 to Emmeroy Beecher(b. Bradford Co., PA; d. 1901, Hardin Co., IA).
James and Margaret are listed in the 1871 Ontario census as living in Haldimand Twp., Northumberland Co. Also in the same township is a man young enough to be their son, Isaac Glenny (b. abt 1842-1843, Ireland). Both are listed as farmers and as Presbyterian.
Now, there is a Glenny family who arrives in Iowa about the same time my William Glenney arrives. They settle about two counties east and one of them was "from Canada", but probably born in Ireland (the others were born in Ireland according to records).
First is Alexander Glenny, born 1817 in Ireland to ? Glenny and Nancy ALLEN. He died in Black Hawk Co., IA in 1910. He was naturalized in Black Hawk Co. during the 1860s (I've misplaced my notes, so I can't give an exact date).
At the same time that Alexander was naturalized, Henry Glenny was also naturalized in Black Hawk Co. He was born in 1837 in, most likely, Ireland and he died in 1927 in Black Hawk Co. His naturalization record lists him as being from Canada. He is quite probably the son of Alexander Glenny.
There is also a James Alexander Glenney in Black Hawk Co. at this time. He was born 1843 in Ireland and he married Jennie Bryson in Buchanan Co. (next to Black Hawk Co.) in 1870. They are listed as living in Black Hawk Co. in the 1870 census. This James died in 1891 and is buried in Buchanan Co. He could possibly be another son of the above Alexander.
So, the point of all this is: My James and the above Alexander were born about the same time in Ireland. They were having children about the same time. If Henry Glenny is Alexander's son, then this Glenny family also immigrated to Canada at some point, like my James and his family. Though my James and Margaret didn't immigrate to Iowa, their son, William did. He appears in Iowa during the same time frame as Alexander, Henry, and James Alexander, and settles only a couple of counties away from them.
This seems like more than coincidence to me, but I've searched high and low and can't seem to find the right puzzle pieces to complete the picture. Does anything I've said above sound familiar to anyone? Can anyone else add anything or prove that the suggested relationships aren't correct?