Brother is Sam Lash see end of notes for documentation,

Jacob kept breaking his watch, so he could see Molly in her father’s shop in Montrael, Canada.23
Residence at Rachel wedding 332 Cadieuz St Monteral, Canada29

This was the family myth. Lashuk is the family name.  Where it came from???  There are a couple stories I've heard about the "switch to kaufman" by Jacob Kaufman (our great-grandfather).  In Russia, everyone was Lashuk, including Jacob.  But to leave the country, the Czar would only let so many sons from a Jewish family leave the country...military service issue.  So Jacob changed his name from Lashuk to Kaufman.  Kaufman was either a cousin's name or a friend's or just made up. See note on Yonaton Laroche for more information.30

After putting everybody one in the the picture that can be seen on Yonaton/Chiam/Herbert (Jacob’s father) on the family tree, I am sure that I have figured out the mystery the family name.   This is the solution.  Rochel Leah’s elder sister, Zelda, died, so tradition mandated that Burned Kaufman married the next oldest sister to care for his child, Rose, which was Rochel Leah.  Obviously when the photo was taken he was not included in the picture and Zelda had not died yet.  Mystery solved!!

So the conclusion above is that Sam Lash and Jacob Kaufman are BROTHERS and man named Burned Kaufman who left Russia when his daughter was just one and toiled in America for 10 years, so he could bring his wife who he last saw when she was 21 and 7 members of her family is responsible for our being in the United States.  Many of us carry his name rather than our own as a tribute to him.31