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 |
|---|---|---|
| Wardlaw | 2 | 1532 (by); 1641 (chalmerlanry) |
| Wardlau | 1 | 1515 (cautionar) |