| Role | Name | Name (original language) | Name (translation) | Floruits |
|---|---|---|---|---|
| Addressor | Alexander IV, pope (d.1261) | Alexander | Alexander, bishop, servant of servants of God | 1255 × 1261 |
| Addressee | Unknown, bishop of Glasgow | Episcopo Glasguensi | bishop of Glasgow | 1165 × 1258 |