| Family with parents |
| father | |
| mother |
Williamina Balfour Allen Gunn Birth: 16 August 1855 — South Ronaldsay, Orkney, Scotland, UK |
|
Marriage: 18 November 1876 — |
|
| himself |
| Family with Mary Laird Sinclair |
| himself | |
| wife |
Mary Laird Sinclair Birth: 27 July 1881 — Breakhouse, Burray, Orkney, Scotland, UK |
|
Marriage: 12 September 1901 — Breakhouse, Burray, Orkney, Scotland, UK |
|
|
4 years daughter |
Margaret Sinclair Thomson Birth: 23 July 1905 23 — Burray, Orkney, Scotland, UK Death: 9 May 1974 |