A source (Book "Star Stats: Who's Whose in Hollywood" by Kenneth S. Marx. Price, Stern, Sloan Publishers, Inc., Los Angeles, 1979, ISBN 0-8431-0498-8) states that actor
Bruce Cabot was first married to Grace Mary Mather Smith, an actress, and they had a daughter born in 1929, Jennifer De Bujac. They were divorced some time in or before 1933. It is possible that this Grace Smith and Grace Mary Mather Smith are the same person.