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 |
|---|---|---|
| Kethik | 6 | 1473 (corn-miln); 1495 (alehous); 1504 (burch); 1542 (bruch, corn-miln); 1555 (cow) |
| Keiththik | 1 | 1552 (burch) |