The Master Surname Database (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these names;

Arnold SLY, born 26 Mar 1913 (son of Oria SLY) info from Champian birth records.

Floyd SLY, - 9 Jan 1956 age 46yrs, burial in the Beechmont cemetery, Edmonton.

For further research please contact the Research Committee of the Edmonton Branch.
http://abgensoc.ca/

The Edmonton Branch
http://www.agsedm.edmonton.ab.ca/
Peter