Malcolm Vivian Hay
| Major Malcolm Vivian Hay of Seaton | |
|---|---|
| Malcolm Vivian Hay in 1914 | |
| Born | 21 January 1881 | 
| Died | 27 December 1962 (aged 81) Aberdeen, Scotland | 
| Education | St Basil's grammar school, St John's preparatory school | 
| Occupation(s) | Cryptographer and historian | 
| Spouse(s) | Florence de Thiene, Alice Ivy Hay | 
| Children | James Malcolm Hay, Elizabeth Hay, Georgiana Hay, and Peter Brian Hay | 
| Parent(s) | James Gordon Hay and Elizabeth Forbes | 
Major Malcolm Vivian Hay of Seaton (1881–1962) was an officer in the Gordon Highlanders, a cryptographer during the First World War, a historian of Catholic and Jewish history, and the last Laird of Seaton House in Aberdeen, Scotland. The grounds of the estate are now Seaton Park.