David Kennedy, 1st Earl of Cassilis (before 1478 – 9 September 1513) was a Scottish peer, the son of John Kennedy, 2nd Lord Kennedy. Invested as a Knight on 29 January 1487/88 by King James III, he wed Agnes Borthwick, daughter of Sir William Borthwick, 2nd Lord Borthwick, before July 1489. At some point before 1500, she bore him a son, Gilbert.
Between 24 July 1508 and 13 May 1509, he succeeded to the title of 3rd Lord Kennedy. Shortly thereafter, on 9 August 1509, he married his second wife, Margaret Boyd, daughter of Thomas Boyd, 1st Earl of Arran and Princess Mary Stewart of Scotland. Four years later, on 9 September 1513, he died while fighting at Flodden Field.
| Peerage of Scotland | ||
|---|---|---|
| New title | Earl of Cassilis 1509–1513 |
Succeeded by Gilbert Kennedy |
| Preceded by John Kennedy |
Lord Kennedy 1508/09–1513 |
Succeeded by Gilbert Kennedy |