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 |
|---|---|---|
| Erole | 4 | 1444 (complain); 1460 (constabil); 1479 (assover); 1507 (countes) |
| Errole | 4 | 1541 (constabil); 1562 (cautioun); 1583 (behufe); 1617 (convoy) |
| Eroule | 1 | 1478 (brek) |
| Erroll | 1 | 1641 (constabil) |