| Children |
| | 1. James Stewart WATT, b. 20 Mar 1827, Stromness [Birth] |
| | 2. Margaret Graham WATT, b. 23 Nov 1828, Stromness [Birth] |
| | 3. William Henry WATT, b. 9 Dec 1830, Stromness [Birth] |
| | 4. Charles Clouston WATT, b. 12 Nov 1832, Stromness [Birth] |
| | 5. Jane Malcolm WATT, b. 4 Oct 1834, Stromness [Birth] |
| | 6. Graham Watt William WATT, b. 1 Aug 1836, Stromness [Birth] |
| | 7. Jannet Malcolm WATT, b. 26 May 1838, Stromness [Birth] |
| | 8. Alexander Stewart WATT, b. 7 May 1840, Stromness [Birth] |
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