Hi there,
Not sure if you are still looking for information, and if we're after the same James Lyall, born in Dundee, Scotland (abt 1888?) and married an Elizabeth Donald (born abt 1885 in Edinburgh). They lived in Portage la Prairie, and were farmers. They died in Portage la Prairie as well.
http://www.canadianheadstones.com/mb/view.php?id=22135They had four sons and a daughter.
If it is the same one, I'm one of his great grandsons, so he definitely had kids! I'd be interested in learning more about Elizabeth as well!
Thanks,
Steven Lyall