I know that Alberta does not have any online records. That is why I've posted here - hoping someone may be familiar with those names. I cannot afford to pay all the fees Alberta requires for my own grandparents and great-grandparents, let alone someone else's.
Yes, we are aware of the Joseph Orton and Agnes Henderson you posted about but they never has a son named Lloyd George nor a child born in December 1913. It is possible that Joseph Orton was Lloyd's uncle.
The source for the information we do have for
Agnes Bryant Orton - b 1890 Ontario
Mary Elizabeth Orton - born 1911 Alberta Canada
Lloyd George Orton - born Dec 13, 1913 Alberta Canada
Mary Bryant - b 1848 in Ontario (mother of Agnes)
is from the 1921 census in Neepawa, MB. Agnes' mother Mary, also a widow, was living with them. Lloyd's date of birth is from his gravestone in Nebraska.