The Master Surname Index (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these possible names;
Agnes DECECCO, - 18 Apr 1997
Annie Mary DECECCO, - 8 Jul 1964 age 45
Domenica DECECCO, - 1 Dec 1972 age 81
Lucia DECECCO, 27 Apr 1989 age 85
Lucia DECECCO, 13 Sep 1998
all from the obituary index at the Coleman museum.
Do a Google Search for "Coleman Museum Alberta"
Also,
Frank, Mr. & Mrs. DECECCO 50th anniversary 28 or 25 Jul 1973
in the indexed Edmonton Journal binders 1972 to 1981 available at the AGS Edmonton Branch, send them an Email.
Also, at the online Canada phone,
http://www.canada411.ca/you can find Dececco names at Blairmore, Fort Macleod and Lethbridge.
For further research please contact the AGS Research Services Committee of the Edmonton Branch,
http://abgensoc.ca/ The Edmonton Branch
http://agsedm.edmonton.ab.caPeter