I have never seen these abbreviations but wonder if they mean his brother, uncle & father were immigrants but he was born in the United States. However, I can't figure out what the D means in B D. In a message dated 12/27/2006 3:14:52 PM Central Standard Time, Nannie1331@aol.com writes: > > Ok, on the 1920 census, I have a male son listed age 17, under Immigration > it has the letters B U F together, states he was born in PA does anyone > know > what this means. Also other listings for young men have Immigration as B D > any suggestions out there!! > >