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 |
|---|---|---|
| Cuthbert | 4 | 1494 (baston); 1562 (compt); 1566 (chalmerlanry); 1580 (commonté) |
| Cudbert | 3 | 1592 (blude, crag); 1598 (amand) |