A heart tearing witness indeed! The place is called Luzk and is in Ukraine, it was Polish before the war and is some 300 km from Sluzk, Belarus. It seems also that the name of her husband was rather Nekrycz, because Ben-Abraham is his penname and Miriam is called Miriam Dvora Brik before the marriage. He was a fascinating person - a journalist, a Mosad agent, wrote a book about Mengele's CIA coverage after the war. I have found his pasport application for immigration to Brazil. I will create a separate tree. There seems to be a separate Lodz branch of the family.
My theory has been confirmed by the search in Yad Vashem database. Miriam Nekrycz submitted about 20 witness documents about the Brik family from Luck, Poland:
https://yvng.yadvashem.org/index.html?language=en&advancedSearc...
So her husband was Henry Nekrycz from Lodz, Poland.