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I'm afraid I'm not familiar with that site, so I can't be sure if it's legit. I say wait until she's been introduced on the show. If it's true and she is Hawkeye's ex-wife, put it back then, in the characters relationship section.
Don't make a category if you don't intend to put it in some other category. Also, the World War II veterans are soldiers who survived the war, and half of all those individuals in that category were killed well before the war's end. I think that category isn't needed.