| Old Norse | Date | Headword | 1st El. | 2nd El. | URL | |||
| *Þrastarruð | 1578 | Trosterudt | Trosterud | þrostr | thrush | ruð | clearing in a wood | Link |
| 1600 | Throsterudt | Trosterud | þrostr | thrush | ruð | clearing in a wood | Link | |
| Þrostahaugr | 1578 | Trostholl | Trosthol | þrostr | thrush | haugr | burial mound | Link |
| 1604 | Troesthoell | Trosthol | þrostr | thrush | haugr | burial mound | Link | |