Where does “Eochaidh” come from?

Eochaidh (Irish) comes from Old Irish Eochaid, from Primitive Irish ᚓᚊᚑᚇᚇᚔ, from Proto-Celtic ekʷos, from Proto-Indo-European h₁éḱwos, from Proto-Indo-European h₁oh₁ḱu- — swift.

Ancestry of “Eochaidh”, step by step

StepLanguageWordMeaning
1Old IrishEochaid—
2Primitive Irishᚓᚊᚑᚇᚇᚔ—
3Proto-Celticekʷoshorse
4Proto-Indo-Europeanh₁éḱwosstallion, horse
5Proto-Indo-Europeanh₁oh₁ḱu-swift
Every word from Proto-Indo-European h₁oh₁ḱu- →Every word from Proto-Indo-European h₁éḱwos →Every word from Proto-Celtic ekʷos →