Hi All. I am J. Young from Cornwall Ontario, heart of Stormont, Dundas, and Glengarry aka SD&G the three eastern most Counties in Ontario, and first settled by Loyalists from the former USA Provinces.
It is quite likely that these Myer/ Mayer/ Meyers and other assorted spellings, were Palatine German Loyalists, who had settled in NY and other colonies of USA, in the 1700s prior to the American Revolution. These folks had fled religious persecution in Germany, and fled to England, which then shipped them off to their American Colonies. They remained Loyal to Britain , and many resettled to Canada after the Rev War ended, in 1783.
I have 3 Loyalist Palatine lines, being Gallinger, Snetsinger and Warner.
I also have 3 Loyalist lines of McDonell / MacDonald. As well as a host of others.
Happy to help, if I can. Cheers J.