This person is commemorated on a memorial in Vijfhuizen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.
Martin BIRNBAUM's town of birth was called Trachenberg (not Frachenberg). It is a town in Silesia, now called Zmigrod, Poland.
His parents were Leopold BIRNBAUM and Alice BIRNBAUM geb. BEHRENDT (1881, Christburg, Westpreussen - 1944, Theresienstadt). Alice was a daughter of Aurelie BEHRENDT geb. CANTORSON (ca.1851, Christburg, Westpreussen - 1910, Breslau). [I wrote that in 2013, but now in 2021,…