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 |
|---|---|---|
| Jakson | 2 | 1493 (custom); 1504 (battaling) |
| Jackson | 1 | 1515 (chaplan) |