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 | 
|---|---|---|
| McCulloch | 2 | 1575-6 (becum); 1584 (broder) | 
| McCullocht | 1 | 1561 (bute pursevant) |