Friedrich married Caroline Wilhelmine Auguste Jahn 16 May 1890. Caroline (daughter of Carl Ludwig Jahn and Hanna Sophie Jahnke) was born 30 Nov 1853, Langen, Belgard, Pommern; died 4 Sep 1936. [Group Sheet]

1. Maria Martha Magdalena Trebess was born 16 Oct 1885, Groß Poplow, Belgard, Pommern.
2. Else Martha Auguste Trebess was born 23 Feb 1891, Stettin, Pommern; died 21 Dec 1982.
3. Paul Friedrich Wilhelm Trebess was born 24 Apr 1892, Stettin, Pommern; died 29 Jul 1949.