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 |
|---|---|---|
| Twed | 1 | 1470 (brig-) |
| Tweda | 1 | 1457 (bondlesoure) |
| Twede | 1 | 1489 (cursour) |