I'm wondering if you're still trying to sort out Frank F. Brondi. I am doing research for a friend and Frank comes up in my searches. You mentioned Hattie Reid living with Frank.
She was in fact born Harriet Albertha Reid (1890)
She had been married to Charles Arthur Bonney and I think that is the husband she left. He died in 1952.
I think Raymond F. Brondi born in 1931 was the son of Frank Brondi and Hattie. She was sometimes known as Hattie, Fannie or Bertha. According to findagrave.com at her death in 1962 in Brantford, Ontario she is noted as Harriet Albert Reid Brondi.
Hope this explains who the second 'Bertha' is.