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 |
|---|---|---|
| Gaderer | 3 | 1540 (clem); 1541 (cast); 1629 (bedhous) |
| Gadderar | 1 | 1604 (cres) |