The William Grant Robinsons of Buffalo, NY

I, Barbara Rose Robinson Manhardt, am researching my father, William Grant Robinson. He married Edna Caroline Oliver in 1935. They had seven children Shirley, Kenneth, Jane, Barbara, Donald, William and Judith. His parents George Robinson and Ida Jane Brooks, my grandparents, passed away before they married. I cannot find any information regarding them. He had one brother and two sisters, my information on them is very limited.
I would appreciate any information and will share what little information I have.