First - I love how you've done so much research and posted the relevant sources so we can really see what you're asking.
I agree with you that, without death cert or marriage cert, it’s difficult to tell who is who. There is more than one John Ramsey born about 1854 and more than one born late 1860s. That said, the two Johns - one in New York and one in the Midwest - do appear to be separate people. Their ages are significantly different, and show a consistency (for each of them) across three census years. ==================================================
JOHN #1 1860 Greene, Chenango, NY John Ramsey 7 - born about 1853 1870 Greene, Chenango, NY John Ramsey 16 - born about 1854 1880 Greene, Chenango, NY John Ramsey 26 - born about 1854
JOHN #2 1900 Martin County, Minnesota - John Ramsey 36 born November 1863 1905 Martin County, Minnesota - John Ramsey 36 [sic] - born about 1869 1910 Fergus County, Montana - John Ramsey 43 (age cx by Ancestry user) b abt 1867 1920 Fergus County, Montana - John Ramsey 54 - born about 1866 1930 Fergus County, Montana - John Ramsey - born about 1867
I haven't done this yet - but it may be possible to track John Ramsey marrying Marguerite Morf (possibly in Fayette County, Iowa) and find his parents' names that way.
Marguerite's mother Catharine Morf, born Switzerland, is living with them in 1920 in Lewistown, Fergus, Montana.
1880 Eden, Fayette, Iowa John Morph 40 born abt 1840 Switzerland [spelled Morf in IA state census] Catharine Morph 38 born about 1842 in Switzerland Maggie Morph 11 born about 1869 in Wisconsin Johnny Morph 8 Christopher Morph 4 Rosa Morph 2
MINNESOTA BIRTH RECORD Fay Clifford Ramsey Born 07 March 1901 Mother’s maiden name: Morf <----------- Martin County, Minnesota http://people.mnhs.org/bci/Results.cfmhttp://people.mnhs.org/bci/Results.cfm
1905 MN state census Center Creek, Martin, Minnesota John Ramsey 36- born about 1869 Magie 36 Harry 12 Lester 8 Ray 5 Fay 3
You wrote the following - but I didn't understand what you meant: "What I like about the Minnesota 1900 man is that his parents really were born in Ireland and his mother really was Mrs. Mary [Kinnier] Ramsey."
Does this mean you have evidence that the John Ramsey in Minnesota/Montana has a mother with maiden name Kinnier?
In 1900 in Minnesota, John's mother Mary is age 79, born April 1821 in Ireland.
In 1900 in New York, the mother to John is about age 67 (if she is still living) -- significantly younger.