Otto married Ingeborg Valentiner 11 May 1883, Greve, Præstø, Danmark. Ingeborg (daughter of Heinrich Nicolai Valentiner and Julie Augusta Elizabeth LARPENT DE TRIPIAN) was born 26 Apr 1862, Sallerupgård, Kong, Praesto, Denmark; was christened 22 Jun 1862, Greve, Præstø, Danmark; died Danmark. [Group Sheet]

1. Contesse Asta Bertha Julie von Moltke was born 31 Mar 1884, Ruds Vedby, Ruds Vedby, Holbaek, Denmark; died Yes, date unknown.
2. Ernst von Moltke was born 16 Oct 1885, Ruds Vedby, Ruds Vedby, Holbaek, Denmark; died Yes, date unknown.
3. Aage von Moltke was born 25 Nov 1886, Ruds Vedby, Ruds Vedby, Holbaek, Denmark; died 10 Sep 1955.
4. Contesse Else von Moltke was born 2 Mar 1888, Ruds Vedby, Ruds Vedby, Holbaek, Denmark; died Yes, date unknown.
5. Bertha von Moltke was born 3 Aug 1891, Nerager, , , Denmark; died Yes, date unknown.
6. Otto von Moltke was born 2 Jul 1895, Nerager, , , Denmark; died Yes, date unknown.