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 |
|---|---|---|
| Aytoun | 2 | 1587 (cietenar); 1600 (conqueser) |
| Aitton | 1 | 1548 (brankis) |