The August 6 1930 edition of the Toronto Daily Star contained this photo of Canadian-born actress Marjorie White and her younger sister, Belva:
I could find no trace of Belva White either under this name or her given name of Belva Guthrie.
Marjorie White (1904-1935), sadly, had a little over five years to live after this photo was taken. She died in a car crash in California; the driver of the car that she was in was blamed for reckless driving.
I tried tracing the Guthries at 336 George Street. Morley and Nettie Guthrie are listed there starting in 1927; Ms. White’s Wikipedia page suggests that they were her brother and mother. The two Guthries lived together until 1944, eventually moving to an apartment on Huntley Street; I couldn’t find them after that.