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 |
|---|---|---|
| Symson | 4 | 1488 (conquest); 1509 (asure); 1527 (creilman); 1569 (court clerk) |
| Symsoun | 4 | 1472 (cuppill); 1541 (bauchill); 1580 (crayar); 1582 (curing) |
| Symsone | 1 | 1497 (day) |