My paternal great-grandfather was David Greenbaum (originally Duvid Grynbaum,) born in Poland sometime around 1900. He immigrated to the US around 1914 with one brother, Reuben (sp?), and lived in Bradford, PA. He then moved to Brooklyn and married Rosa (last name unknown). Children were Fred (b. 1930) and Melvin (b. around 1934). Melvin married Helen (last name unknown). Children were Larry (b. 1961) and Beth. Fred married Ann Corsini (b. 1934). Children were Jon (b. 1961) and Ted (b. 1969).
I know next to nothing about this branch of my family tree, and if anyone has any connections or has any more information I would love to hear from you!