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 |
|---|---|---|
| Mongo | 2 | 1490 (brigantine); c1592 (complece) |
| Mungo | 2 | 1608 (companȝorie); 1642 (dagmaker) |
| Mongow | 1 | 1579 (bulȝeon) |