Records from the Library and Archives of Canada include Veterans Death Cards: First World War and the microfilm where they can be found.
Next of Kin: Bertha Cameron, Wife
1030 E. Mitchell Drive
From Frank Cameron's Attestation Papers (1918):
Present address: 14081 Coit Rd, Cleveland, Ohio
Place of Birth: Ramsay, Isle of Man
DOB: 9 November 1891
Next of kin: Mrs. Jane Kate Cameron, Mother
Residence of Next of Kin: Ramsay, Isle of Man
The Cleveland, Ohio, Necrology database had the following information:
Id#: 0449050Name: Cameron, Frank
Date: Jul ? 19?
Source: Cleveland Press; Cleveland Necrology File, Reel #097.
Notes: Cameron. Frank Cameron, beloved husband of Bertha, passed away July 4th, at Phoenix, Ariz., Merle Miller (niece), Lakewood, O.
Frank Cameron's Arizona death certificate online here.