Mary Guibert is an American Zonian businesswoman notable for being the ex-wife of Tim Buckley and the mother/estate executor of Jeff Buckley. She was born in Panama but spent much of her childhood in Anaheim, California, where she showed promise as an actress and musician. Those dreams fell apart when she gave birth to her first son, Jeff, and she spent many years working many odd jobs such as a cottage industry clothes maker and medical industry office worker. In 1997, after the death of her son, she dedicated herself to what she sees as the proper treatment and marketing of her son's work.
She is also notable for asking Napster to shut down the accounts of users sharing uncopyrighted bootleg recordings of Buckley's music. This is a precedent in a largely unexplored area of music law.