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 |
|---|---|---|
| Thom | 2 | 1512 (brewland); 1632-3 (ask-wedinsday) |
| Thome | 1 | 1568 (copy) |