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 | 
|---|---|---|
| Mitchell | 3 | 1556 (debate); 1624 (alehous); 1643-4 (big) | 
| Michell | 1 | 1600 (cancellar) |