I just read this and must confess your Subject Line didn't tweak my interest hence I missed it.
The Kotchan farm was a few miles east of Simcoe in Townsend township near the Cockshutt Road if my memory is correct, one or two east of Culver's.
I knew George Kotchan who was born 1924 he would be found in Tim's having coffee with the boys talking weather, farming and lost neighbors in the 80's and 90's. He died in 2012.
http://www.smithfuneralchapel.com/smith/death-notices?death_id=657I also found Mary's obit in the Jarvis Record it says they were married 1913 in Fort William.
https://ja.haldimandcounty.on.ca/1960s/1966/1966_April/1966_04_28_p01.pdfAnother, was a male a longtime member of the Norfolk County Farm Safety Association but I haven't heard his name in recent years so I'm not sure if he is still around or deceased hence my omission of his name. I believe he lived south of Delhi so he might not be related.
And finally, there is one still living who is minutes north of me in Jarvis. Her niece (by marriage), is a neighbor. If you want I can see if she's willing to take a telephone call.
Send me a PM, I can provide you with some names and other information.
Don