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 |
|---|---|---|
| Logan | 3 | 1497 (anniversar); 1506-7 (cristinn-); 1565 (corrall) |
| Logane | 3 | 1439 (bailȝe); 1531 (cunningly); 1574 (bra) |