I, too, am glad to find people researching BEIser (compared to BIEser).
My great grandfather, Herman Beiser married his wife Lena Kessler Beiser in 1905-1907. They had several children (Ruth Beiser O'Leary, Frances Beiser Wharton, Florence, George Beiser, Frank Beiser, Herman Beiser Jr) in addition to my grandmother Lillian Beiser Conroy.
I have no info on family pre-dating Herman. I assume he had brothers and sisters and they might not necessarily have been from New York. He could have migrated to New York from another part of the country. He doesn't appear on any of the passenger lists for New York on EllisIsland.org, so I assume he had been here in the country for a while.
If you have any information connecting your Beiser to Herman Beiser, please contact me at
DesertChildAZ@yahoo.com.
Thank you,
Kelly A. Conroy