| Role | Name | Name (original language) | Name (translation) | Floruits |
|---|---|---|---|---|
| Grantor | Edward Bruce, lord of Galloway, earl of Carrick, king of Ireland (d. 1318) | Edwardi de Brois | lord Edward de Brus our beloved brother formerly lord of Galloway | 1309 × 1316 |
| Beneficiary | Whithorn Cathedral Priory | 1226 × 1294 |