I have some doubts about the lad being yours, although it's true the lads often played with information just for the fun of it, I think.... so good to keep an open mind, just don't pin your hat to anyone yet until you get some real proof.
This marriage of a Francis in Ontario had no parents listed, nor places of birth, and I could not see them on 1921 to help with more info, so darn, but will post anyway in case more turns up.
https://familysearch.org/pal:/MM9.1.1/278B-VTWThere is this B.C. death which also is interesting if you have the birth date to compare?
To move or retire to the beautiful West Coast was very common.
Frederick Francis Jenkins Death New Westminster, British Columbia (resided Burnaby)
13 May 1976 Age 76 Birth Date 28 Feb 1900, England
his daughter gave the information, Father Jenkins...nothing else known about parents
Spouse 's name Bernice Johanna Zacharias .... More on image:
https://familysearch.org/pal:/MM9.3.1/TH-267-12699-110249-33?cc=1538285