There are many people with the same or nearly the same name, who have served at some time. You have only given us a rank (an common one) and the last name. With more information (i.e. Full name, Nicknames, Military Branch, Unit(s), Joining date and location, Military service number) someone might take this on, but without it's dead.
You could try "Find A Grave" (website), look at the role of honor (Ottawa and others).
Good Luck Wendy