The following information is taken from the Dictionary of the Older Scots Tongue, available online at http://www.dsl.ac.uk/index.html. This is a work in progress.
| Spelling | Number | Dates & headers |
|---|---|---|
| Baxstare | 1 | 1379 (baxter) |
| Baxtar | 1 | 1531 (capellan) |
| Baxter | 1 | 1583 (allacay) |
| dictus Baxter | 1 | 1324 (baxter) |