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 |
|---|---|---|
| McGill | 2 | 1611 (cleuk); 1642 (brother) |
| McGille | 1 | 1480 (anherdance) |