Archibald married Sarah Agnes Winnifred O'Boyle 13 Jun 1900, , Saint John, New Brunswick, Canada. Sarah (daughter of Lawrence O'Boyle and Mary Almeda Gough) was born 10 Apr 1882, Lumsden, Albert, New Brunswick, Canada; died 10 Nov 1972. [Group Sheet]

1. George Archibal Chestnut was born 20 Mar 1901, Hampton, Kings, New Brunswick, Canada; died Yes, date unknown.
2. Mary Isabella Chestnut was born 27 Aug 1903, Hampton, Kings, New Brunswick, Canada; died Yes, date unknown.
3. Walter Edgar Chestnut was born 16 Aug 1904, Hampton, Kings, New Brunswick, Canada; died Yes, date unknown.
4. Sadie Winifred Chestnut was born 16 Jul 1906, Hampton, Kings, New Brunswick, Canada.
5. Frances A Chestnut was born May 1908, , , New Brunswick, Canada.
6. Thomas E Chestnut was born 23 May 1908, Memramcook, Kings, New Brunswick, Canada.
7. John Lawrence Chestnut was born 27 May 1910, Upham, Kings, New Brunswick, Canada.
8. Dorothy Eleanor Chestnut
9. Almeda Chestnut
10. Elmer Chestnut died 8 Oct 1989.