The following information is taken from the Dictionary of the Older Scottish Tongue, available online at http://www.dsl.ac.uk/index.html. This is a work in progress.
| Spelling | Number | Dates & headers |
|---|---|---|
| Keith | 5 | 1573-4 (dame); 1574 (appell, countes); 1602 (buriar); 1623-4 (bak-cuming) |
| Keyth | 2 | 1569 (convene); 1605 (cow) |