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 |
|---|---|---|
| Roberton | 2 | 1545 (baillerie); 1586-7 (cunsall-hous) |
| Robertoun | 1 | 1508 (bastardry) |
| Roberttoun | 1 | 1562 (circumduce) |