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 |
|---|---|---|
| Iasper | 1 | 1558 (chanclar) |
| Jasper | 1 | 1554 (daft) |
| Jaspert | 1 | 1602 (bridil) |