Margaret Woodin was presumably an American composer only known from the sheet music covers of her one-off Boiled Owl (1911) which was published by F.B. Haviland Pub. Co., New York. The copyright holder is given here as Margaret W. Coutchie and thus possibly Woodin may be a maiden name. This is as yet unconfirmed.
For data housekeeping purposes she is listed in these webpages as a one-off composer.