There is only one place named Barweiler in Rhineland-Palatinate,
belonging to Verbandsgemeinde Adenau.
Civil vital records exist there starting ca. 1798, thus the actual birth
record should be found at the Standesamt.
Contact : Standesamt Adenau, Kirchstr. 15, 53518 Adenau, Tel 0049 2691 3050.

The name adoption register of 1808 might be available there too, showing
his family. If you find it there, please inform Gersig, it is an
important genealogical tool.

Ernest Kallmann, Cercle de Genealogie Juive, Paris