| Birth* | 1898 | James Niven Duncan was born.1 |
| Occupation | 24 Jan 1924 | He was a gamekeeper.1 |
| Residence* | 24 Jan 1924 | He lived at Kipney Cottage, Logiealmond, Perthshire, Scotland.1 |
| Marriage* | 24 Jan 1924 | He married Isabella Grewar, daughter of James Grewar and Annie Simpson Shaw, at Dalhally, Glenisla, Forfarshire, Scotland. The marriage was solemnised by Rev. Wilfred J. Lewis.1,2,3,4 |
| Occupation | 26 Feb 1926 | James Niven Duncan was a gamekeeper.2 |
Birth Reg (Informant) | 11 Mar 1926 | He registered the birth of Marjorie McDougall Grewar Duncan, his daughter, in Logiealmond.2 |
Death (Survivor) | 13 Oct 1941 | James Niven Duncan became a widower on the death of his wife Isabella.3,4 |
| Occupation | 14 Oct 1941 | James Niven Duncan was a gamekeeper.3 |
| Occupation* | 25 Sep 1948 | He was a farmer.4 |