Middle English word reother comes from Proto-Germanic *hrīþō (A seizure; fit. A storm. A sudden onset; attack.), Proto-Indo-European *ḱerh₂-
| Dictionary entry | Language | Definition |
|---|---|---|
| *hrīþō | Proto-Germanic (gem-pro) | A seizure; fit. A storm. A sudden onset; attack. |
| *ḱerh₂- | Proto-Indo-European (ine-pro) | |
| *hrinþaz | Proto-Germanic (gem-pro) | A horned beast, as in a neat or ox. |
| hrūþ | Old English (ang) | |
| hriþer | Old English (ang) | Cattle. |
| hrīþ | Old English (ang) | |
| ruther | Middle English (enm) |