The following information is taken from the Dictionary of the Older Scots Tongue, available online at http://www.dsl.ac.uk/index.html. This is a work in progress.
| Spelling | Number | Dates & headers |
|---|---|---|
| Jak | 5 | 1545 (borch); 1561 (brigand, commoun); 1581 (cart); 1628 (blak) |