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 |
|---|---|---|
| Bosuell | 3 | 1492 (answer, claym); 1506 (barras) |
| Boswell | 1 | 1508 (chawmerlane) |
| Boswyll | 1 | 1497 (call) |