Just to add to this subject to help as I am in that family tree just a few generations down.
James, Janet and Alex all came to Canada in the year of 1913.
In 1916 they had another son named James
In 1919 they had another son named Gordon
Records of this are from the 1916 census and the 1921 census.
Please note that the 1921 census shows incorrect names on the searches for most of the family. The names when read by eye and not a computer scanner you will see they are the same as the 1916 census. The address is also the same on both census's.
Please send me a message as I could use some help colaborating more information on this part of my family.