Middle English word hey comes from Proto-Germanic *ahwō (Stream, river. Water.), Proto-Indo-European *h₂ōwyóm (Egg.), Old English hēlā, Proto-Indo-European *kewh₂-, Proto-Indo-European *kowə-, Proto-Indo-European *kowH-, Proto-Germanic *ajjan
| Dictionary entry | Language | Definition |
|---|---|---|
| *ahwō | Proto-Germanic (gem-pro) | Stream, river. Water. |
| *h₂ōwyóm | Proto-Indo-European (ine-pro) | Egg. |
| hēlā | Old English (ang) | |
| *kewh₂- | Proto-Indo-European (ine-pro) | |
| *kowə- | Proto-Indo-European (ine-pro) | |
| *kowH- | Proto-Indo-European (ine-pro) | |
| *ajjan | Proto-Germanic (gem-pro) | |
| ēa | Old English (ang) | |
| *ajją | Proto-Germanic (gem-pro) | Egg. |
| æg | Old English (ang) | Egg. |
| ǣġ | Old English (ang) | |
| *hawwaną | Proto-Germanic (gem-pro) | To chop, to hew. To forge. |
| *hawją | Proto-Germanic (gem-pro) | Hay. |
| hīeġ | Old English (ang) | |
| ey | Middle English (enm) |