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 |
|---|---|---|
| Renfrew | 5 | 1449 (burgeis, burrowis); 1488 (chapter); 1490 (commonté); 1539 (annexatioun) |
| Ranfrew | 3 | 1494 (calling, crounar); 1517 (continuatioun) |
| Renfrow | 1 | 1482 (brefe) |