1  Francesco Langmann (abt 1845 Italy – )   +  (Name Unknown)      2  Luigi Giorgio Langmann ( – 25 Oct 1923 La Plata, Buenos Aires, Argentina)         +  Maria Clara Sarhy             3  Ernestina Rosa Langmann (1903 La Plata, Buenos Aires, Argentina – 26 Sep 1997 La Plata, Buenos Aires, Argentina)            3  Martin Felix Francisco Langmann (23 Sep 1906 La Plata, Buenos Aires, Argentina – 23 May 1960)               +  Adela Arenas (12 Jun 1911 – )                  4  Felix Jorge Langmann (3 Jan 1938 Catamarca, Argentina – 4 Nov 2002 La Plata, Buenos Aires, Argentina)      2  Felix Pedro Langmann ( – 16 Dec 1905 La Plata, Buenos Aires, Argentina)