M, b. circa 1848, d. 8 May 1919
| Birth* | John Duncan Jr. was born circa 1848 at Greenock, Renfrewshire, Scotland.1,2,3,4,5,6 |
| Occupation* | He was a clerk circa 1873 at Greenock, Renfrewshire, Scotland.1 |
| Residence* | He lived before 8 July 1873 at 6 Brougham Street, Greenock, Renfrewshire, Scotland.1 |
| Marriage* | He married Margaret Gardner Blair, daughter of Joseph Blair and Ann Gardner, on 8 July 1873 at 2 Watt Place, Greenock, Renfrewshire, Scotland. The wedding party included Thomas Dunlop and Isabella Gardner Blair.1 |
| Birth of Son | His son John Duncan was born circa 1875 at Greenock, Renfrewshire, Scotland.2,7 |
| Occupation | John Duncan Jr. was a mercantile or shipping clerk between 1876 and 1907 at Glasgow, Lanarkshire, Scotland.8,2,9,10,11,7,12,3,13 |
| Birth of Daughter | His daughter Maggie Blair Duncan was born on 16 April 1876 at 18 Watt Street, Glasgow, Lanarkshire, Scotland.8 |
| Occupation | John Duncan Jr. was a clerk at Clyde Towing Company circa 1878 at Glasgow, Lanarkshire, Scotland.14 |
| Birth of Son | His son Joseph Blair Duncan was born on 22 January 1878 at 18 Watt Street, Glasgow, Lanarkshire, Scotland.14 |
| Census* | John Duncan Jr. appeared as the head of a household along with his wife, Margaret Gardner Blair on the census of 1881 at 149 Govan Road, Govan, Glasgow, Lanarkshire, Scotland. The household also included John Duncan, Maggie Blair Duncan and Joseph Blair Duncan.2 |
| Birth of Son | His son Matthew Blair Duncan was born on 28 December 1883 at 159 Govan Road, Govan, Glasgow, Lanarkshire, Scotland.9 |
| Birth of Son | His son Robert Blair Duncan was born on 29 January 1886 at 159 Govan Road, Govan, Glasgow, Lanarkshire, Scotland.10 |
| Death of Son | His son Robert Blair Duncan died on 20 March 1886 at 159 Govan Road, Govan, Glasgow, Lanarkshire, Scotland.11 |
| Death of Son | His son John Duncan died on 31 October 1889 at 159 Govan Road, Govan, Glasgow, Lanarkshire, Scotland.7 |
| Birth of Daughter | His daughter Annie Gardner Blair Duncan was born on 5 July 1890 at 159 Govan Road, Govan, Glasgow, Lanarkshire, Scotland.12 |
| Census | John Duncan Jr. appeared as the head of a household along with his wife, Margaret Gardner Blair on the census of 1891 at 159 Govan Road, Govan, Glasgow, Lanarkshire, Scotland. The household also included Maggie Blair Duncan, Joseph Blair Duncan, Matthew Blair Duncan and Annie Gardner Blair Duncan.3 |
| Occupation | John Duncan Jr. was a cargo wharfinger (owns or manages a wharf) between 1901 and 1919 at Glasgow, Lanarkshire, Scotland.4,15,5,16,17,6 |
| Census | He appeared as the head of a household along with his wife, Margaret Gardner Blair on the census of 1901 at 185 Kent Road, Glasgow, Lanarkshire, Scotland. The household also included Maggie Blair Duncan, Matthew Blair Duncan and Annie Gardner Blair Duncan.4 |
| Marriage of Son | His son Joseph Blair Duncan married Agnes Isabella Reith, daughter of William Reith and Agnes Morris Murdoch, on 27 December 1906 at 13 Clifford Street, Govan, Glasgow, Lanarkshire, Scotland.15 |
| Marriage of Daughter | His daughter Maggie Blair Duncan married John Frederick Duncan, son of Henry Duncan and Annie McDonald, on 23 April 1907 at Hotel Balmoral, Sauchiehall Street, Glasgow, Lanarkshire, Scotland.13 |
| Census | John Duncan Jr. appeared as the head of a household along with his wife, Margaret Gardner Blair on the census of 1911 at 185 Kent Road, Glasgow, Lanarkshire, Scotland. The household also included Annie Gardner Blair Duncan.5 |
| Marriage of Son | His son Matthew Blair Duncan married Agnes Auld Wardrop, daughter of David Crawford Wardrop and Margaret Simpson Auld, on 7 December 1911 at Lauriston Parish Church, Norfolk Street, Glasgow, Lanarkshire, Scotland.16 |
| Marriage of Daughter | His daughter Annie Gardner Blair Duncan married Henry Cunningham Barton, son of William Cummingham and Mary Hamilton, on 9 April 1914 at 17 Lynedoch Crescent, Glasgow, Lanarkshire, Scotland.17 |
| Death* | John Duncan Jr. died on 8 May 1919 at 185 Kent Road, Glasgow, Lanarkshire, Scotland. The informant listed on the death certificate was Annie Gardner Blair Barton.6 |