Dale: Trouble is, those ten footnotes don't prove anything. They merely indicate that 10 records included the name "Charles Elmer" (or possibly a variant thereof, like Charles B. Elmer or Chas. Elmer). Those records could be for the subject of the profile, or possibly a grandson of the same name. They don't prove the name of the profile's subject.
The very same sources appear later in the same profile in association with facts about the person -- for example, a census record that indicates that in 1920 Charles B Elmer, age 47, was recorded in Port Chester, Westchester, New York, with his wife and children. That's worthwhile evidence (although I wouldn't go so far as to call it "proof").