William married Clark, Margaret on 30 Apr 1873 in Tanfield, , Durham, England. Margaret (daughter of Clark, Nathaniel and Maw, Sarah) was born on 16 Nov 1846 in Spittal, , Durham, England; was christened on 18 Feb 1847 in Tweedmouth, , Northumberland, England; died after 1911. [Group Sheet] [Family Chart]

1. Neilson, Morag was born in 1875 in Edinburgh, Midlothian, Scotland; died on 12 Aug 1958.
2. Neilson, Elizabeth Stead Cumming was born between Jul and Sep 1876 in Lintz Green, , Durham, England; died on 28 Jan 1957 in 909 Transit Road, Victoria, , British Columbia, Canada.
3. Neilson, Alexander "Alec" "Alec" was born on 14 Aug 1883 in Whitley Bay, , Northumberland, England; died on 9 Apr 1929 in 7 Portland Place, Marylebone, , Middlesex, England.
4. Neilson, Cpl. Nathaniel Clark was born between Apr and Jun 1885 in Whitley, , Northumberland, England; died on 5 Feb 1916 in France and Flanders; was buried in 1916 in Cambrin Military Cemetery, Cambrin, , Nord-Pas-de-Calais, France.
5. Neilson, Margaret Helen was born between Jan and Mar 1888 in Whitley Bay, , Northumberland, England; died between Apr and Jun 1970 in Henley on Thames, , Oxfordshire, England.

Alexander married Cumming, Elizabeth Stead on 30 Apr 1832 in Port Glasgow, , Lanark, Scotland. Elizabeth was born on 26 May 1809 in Port Glasgow, , Lanark, Scotland; was christened on 19 Jun 1809 in Port Glasgow, , Lanark, Scotland; died on 17 Jul 1896 in Oakley, Greenock, , Renfrew, Scotland. [Group Sheet] [Family Chart]