| Language | Reflex(es) | Gloss | Grammar | Sources |
|---|
| Celtic |
| Old Irish | ech | horse | n | LRC |
| Welsh | ebol | foal | n | GED LRC |
| Gaulish | epo- | horse | n.afx | GED LRC |
| Gaulish | Epona | lit. horse-goddess | prop.n | GED LRC |
| English |
| Old English | eoh | horse; (name for) E-rune | n.str.masc | GED LRC |
| Old English | ēored, ēorod | cavalry band/troop, lit. horse-ride(rs) | n.neut | ASD LRC |
| English | eohippus | small 4-toed Lower Eocene horse of N. America | n | AHD W7 LRC |
| English | Éomer | Eastmark marshal/hero in Tolkien: The Lord of the Rings | prop.n | LRC |
| English | Éomund | chief marshal in Tolkien: The Lord of the Rings | prop.n | LRC |
| English | Éored | cavalry unit in Tolkien: The Lord of the Rings | prop.n | LRC |
| English | Éothain | horse-thane in Tolkien: The Lord of the Rings | prop.n | LRC |
| English | Éothéod | Eorl's descendants in Tolkien: The Lord of the Rings | prop.n | LRC |
| English | Éowyn | Rohan shield-maiden heroine in Tolkien: The Lord of the Rings | prop.n | LRC |
| English | equestrian | re: horseback riding | adj | AHD W7 LRC |
| English | equine | re: horse | adj | AHD W7 LRC |
| English | equitant | overlapping transversely at base | adj | AHD W7 LRC |
| English | equitation | riding on horseback | n | AHD W7 LRC |
| English | hippocampus | curved elongated ridge in lateral ventricle of brain | n | AHD W7 LRC |
| English | Hippocrene | fountain on Mt. Helicon sacred to the Muses (Greek mythology) | prop.n | LRC |
| English | hippodrome | oval stadium for horse/chariot races | n | AHD W7 LRC |
| English | hippogriff | legendary animal, lit. horse-griffin | n | AHD W7 LRC |
| West Germanic |
| Old Saxon | ehu- | horse | n.afx | GED LRC |
| North Germanic |
| Runic | *ehwaz | horse; (name for) E-rune | n | LRC |
| Old Icelandic | jōr | horse | n.str.masc | GED LRC |
| East Germanic |
| Gothic | aíƕa- | horse | n | LRC |
| Gothic | *aiƕa-tundi | bramble, prickly bush, lit. horse-thorn | n.fem | GED LRC |
| Italic |
| Latin | equa | mare | n.fem | GED LRC |
| Latin | eques, equitis | horseman, knight | n.masc | LRC |
| Latin | equester | of a horseman | adj | W7 LRC |
| Latin | equinus | of a horse | adj | W7 LRC |
| Latin | equito, equitare | to ride on horseback | vb | W7 LRC |
| Latin | equus | horse | n.masc | GED LRC |
| Latin | hippo- | horse | pfx | W7 LRC |
| Latin | Hippocrene | Hippocrene | n.fem | W7 LRC |
| Latin | hippodromos | hippodrome | n.masc | W7 LRC |
| New Latin | eohippus | eohippus | n.masc | W7 LRC |
| New Latin | hippocampus | hippocampus | n.masc | W7 LRC |
| Middle French | hippodrome | hippodrome | n.masc | W7 LRC |
| French | hippogriffe | hippogriff | n.masc | W7 LRC |
| Italian | ippo- | horse | pfx | W7 LRC |
| Italian | ippogrifo | hippogriff | n.masc | W7 LRC |
| Balto-Slavic |
| Lithuanian | ašvà | mare | n.fem | GED LRC |
| Hellenic |
| Mycenaean | ιθο | horse | n | LRC |
| Greek | ἱππεύς | horseman | n.masc | LRC |
| Greek | hippodromos | hippodrome | n.masc | W7 LRC |
| Greek | hippokampos | sea horse | n.masc | W7 LRC |
| Greek | Hippokrēnē | Hippocrene | prop.n.fem | W7 LRC |
| Greek | ἵππος | horse | n.masc | LRC |
| Anatolian |
| Luwian | á-sù-wa | horse | n | LRC |
| Indo-Iranian |
| Old Persian | asa- | horse | n.afx | LRC |
| Old Persian | aspa- | horse | n.afx | GED LRC |
| Avestan | aspō, aspa- | horse | n | GED LRC |
| Sanskrit | áśvas | horse | n | GED LRC |
| Sanskrit | áśvā | mare | n | GED LRC |
| Tocharian |
| Tocharian B | yakwe | horse | n | LRC |
| Tocharian A | yuk | horse | n | LRC |