I am in possession of a silver cross in the name of Sgt F.H.Pepper.
A possible clue perhaps?
PEPPER, FREDERICK HUBERT
Date of Death:10/04/1917
Regiment/Service:Canadian Infantry 2nd Bn.
Eastern Ontario Regiment
Son of W. G. and Annie B. Pepper, of 321, Mornington Avenue, London, Ontario.
Son of William George and Annie Bridget Armstrong
1887 - 1917
"Grand uncle of wife."
Canadian Virtual War Memorial
If you search his parents, William George Pepper and Annie Bridget Armstrong Pepper on Ancestry.ca you may get some results on surviving relatives.
Your profile says you are RCMP, so good luck in your search!