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 |
|---|---|---|
| Allanson | 2 | 1520 (chaptan); 1537 (at) |
| Alanson | 1 | 1483 (chalder) |