Here’s a photo from the May 11 1934 edition of the Toronto Daily Star featuring two women named Mary Pickford.
Mary Pickford the movie star (1892-1979) was born Gladys Louise Smith in Toronto. Her Wikipedia entry states that she was given the stage name of Mary Pickford in 1907 at the request of the producer of the Broadway play in which she had just been cast; I have no idea whether there was anybody named Pickford in her family tree.
The 1934 Toronto city directory lists the other Mary Pickford as working as a clerk at Simpson’s and living at 46 Radford Avenue. By 1938, she had switched to Eaton’s, and was living at 439 Sherbourne; in 1939, she was back at Simpson’s. The last directory she appears in is 1940.