Clement married Kathryn W. Nix 9 Oct 1912, Huntington, Huntington, Indiana, USA. Kathryn (daughter of Peter A Nix and Johannah Magdalena Brommer) was born 4 May 1889, Indiana; died 14 Mar 1974, Fort Wayne, Allen, Indiana, USA. [Group Sheet]

1. Robert Donald Mettler was born 2 Jul 1914, Fort Wayne, Allen, Indiana, USA; died 27 Mar 1969, Fort Wayne, Allen, Indiana, USA.
2. Mary Eileen Mettler was born 25 May 1916, Fort Wayne, Allen, Indiana, USA; died 18 Apr 2007, Fort Wayne, Allen, Indiana, USA.
3. Constance Magaret Mettler was born 10 Aug 1924, Fort Wayne, Allen, Indiana, USA; died 20 Sep 1998, Taylors, Greenville, South Carolina, USA.
4. M.J. Mettler