Charles married Susanna Lilly Montgomery in 1875 in Sleepy Eye, Brown, Minnesota, USA. Susanna (daughter of James Nelson Montgomery and Janet McDermid) was born on 15 Nov 1855 in Roxborough, Ontario, Canada; died on 10 Sep 1936 in Tucson, Pima, Arizona, USA; was buried in Sleepy Eye, Brown, Minnesota, USA. [Group Sheet] [Family Chart]

1. Katherine Janet Robertson was born on 4 Aug 1876 in Home Twp, Brown, Minnesota; died on 7 Jul 1938 in Tucson, Pima, Arizona, USA; was buried in Home Cem, Sleepy Eye, Brown, Minnesota.
2. Charles Nelson Robertson was born on 13 Aug 1878 in Home Twp, Brown, Minnesota; died on 27 Aug 1968 in New Ulm, Brown, Minnesota, USA; was buried in New Ulm, Brown, Minnesota, USA.
3. Hugh Alexander Robertson was born on 27 Oct 1880 in Home Twp, Brown, Minnesota; died on 15 Mar 1963 in Tucson, Pima, Arizona, USA; was buried in Home Cem, Sleepy Eye, Brown, Minnesota.
4. Ellen Maggie Robertson was born on 28 Apr 1883 in Home Twp, Brown, Minnesota; died on 29 Jan 1953 in Tucson, Pima, Arizona, USA; was buried in Home Cem, Sleepy Eye, Brown, Minnesota.
5. Finlay Martin Robertson was born on 15 Aug 1885 in Home Twp, Brown, Minnesota; died on 17 Nov 1959 in Tucson, Pima, Arizona, USA; was buried in Home Cem, Sleepy Eye, Brown, Minnesota.