I know you asked about relatives from MO or AR, but this Jim Canard was from Mississippi, and since we are in such close proximity, thought I would answer.
I had an uncle named Jim Canard (James Wayne Canard), born in Hattiesburg, MS. His mother was Sally Jane. He was the "black sheep" of the family, was a Merchant Marine, traveled everywhere and was married about nine times (and we use the term "married" loosely). Uncle Jim died about ten years ago and had no children that we know about. He was quite a colorful character. When he died, he was in his early 80's. My grandfather's name was Charlie Clarence Canard and came here from France. He worked on the Panama Canal when the French took over the construction. My grandmother was Sally Jane Soley from Hattiesburg. Their children were, Charlie Clarence Canard, Jr.(my father), Henry Canard, Jim Canard, Ruth Canard, Mary Canard, and Ellen Canard.