+———Francesco Langmann (abt 1845 Italy – )          |      +———Luigi Giorgio Langmann ( – 25 Oct 1923 La Plata, Buenos Aires, Argentina)      |  +———Martin Felix Francisco Langmann (23 Sep 1906 La Plata, Buenos Aires, Argentina – 23 May 1960)  |   |      |   +———Maria Clara Sarhy  |      Felix Jorge Langmann (3 Jan 1938 Catamarca, Argentina – 4 Nov 2002 La Plata, Buenos Aires, Argentina)  |          |   +———Juan Arenas  |   |  +———Adela Arenas (12 Jun 1911 – )      |          +———Juana Etchenique