As my question was hidden behind the answer about the HECKER name,
perhaps it was not understood that I also asked a question about
the tragedian Rachel's maternal grand parents who died in Prague.
Is it possible to find a grave of Alexandre FELIX (or Felix Alexandre)
who died in 1818 and his wife Jeannette SALOMON in 1819?
(information found in the marriage records of Rachel's parents,
see GenAmi number 39).
Micheline GUTMANN, Paris, France