Landau family 18-19th centuries #poland

I am looking for information on early ancestors of Stanislau (Salomon) Landau, born in Poland around 1820 but spent almost his whole life in Germany (Breslau, Berlin). He married Anna (nick name Andzulku or Anschulka) in 1846 who died in Berlin around 1919. I am in particular interested in the early ancestors who lived during the second half of the18th century.
Thank you
Isak Gath, Haifa.

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