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 |
|---|---|---|
| Gregor | 1 | 1510 (calp) |
| Gregorius [1] | 1 | 1333 (bowman) |
| Gregour | 1 | 1552 (componitor) |
| Grigerous | 1 | 1603 (bud-takar) |
[1] This spelling was found in a Latin-language document.