The f.b. would stand for Full Blooded or Full Breed (from Joe Wilson & David Agar). According to the Library & Archives of Canada , F.B. referred to a person with a French parent and a Native parent (French Breed). Other forms used include E.B. (English Breed), S.B. (Scottish Breed), I.B. (Irish Breed), O.B. (Other Breed). "Cree F.B" would mean a person born from a Cree parent and a French parent.