Where does “Rheinhessen” come from?

Rheinhessen (German) comes from German Rhein, from Middle High German Rīn, from Old High German Rīn, from Proto-West Germanic *Rīn, from Proto-Germanic Rīnaz, from Gaulish Rēnos, from Proto-Celtic Reinos, from Proto-Indo-European h₃reyH- — to move, to stir; to rise, to spring; to quarrel,...

Ancestry of “Rheinhessen”, step by step

Rheinhessen traces back through two separate lines of ancestry.

via German Rhein

StepLanguageWordMeaning
1GermanRheinRhine; the river Rhine
2Middle High GermanRīn
3Old High GermanRīn
4Proto-West Germanic*Rīnthe river Rhine
5Proto-GermanicRīnazthe river Rhine
6GaulishRēnosthat which flows
7Proto-CelticReinosriver, waterway
8Proto-Indo-Europeanh₃reyH-to move, set in motion
9Proto-Indo-Europeanh₃er-to move, to stir; to rise, to spring; to quarrel,...

via German Hessen

StepLanguageWordMeaning
1GermanHesseninflection of Hesse: ##...
2GermanHesseA man born in or residing in the state of Hesse;...
3Middle High GermanHesse
4Old High GermanHesso
5Proto-Germanichatjanąto hunt down, pursue; to rush, incite, attack
6Proto-Germanichatazhate
7Proto-Indo-Europeanḱeh₂d-hatred, angriness; strong emotion
Every word from Proto-Indo-European h₃er-Every word from Proto-Indo-European h₃reyH-Every word from Proto-Celtic Reinos