Where does “Centroamérica” come from?

Centroamérica (Galician) comes from Galician América, from New Latin America, from Italian Amerigo, from Proto-Germanic *Amalarīks, from Proto-Germanic Haimarīks, from Proto-Germanic rīks, from Proto-Celtic rīxs, from Proto-Indo-European h₃rḗǵs — to straighten, to right oneself; right; just.

Ancestry of “Centroamérica”, step by step

Centroamérica traces back through two separate lines of ancestry.

via Galician América

StepLanguageWordMeaning
1GalicianAmérica
2New LatinAmerica
3ItalianAmerigo
4Proto-Germanic*Amalarīks
5Proto-GermanicHaimarīksHenry
6Proto-Germanicrīksking, ruler
7Proto-Celticrīxsking
8Proto-Indo-Europeanh₃rḗǵsking, ruler
9Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via Galician centro

StepLanguageWordMeaning
1Galiciancentrocentre; downtown
2Latincentrumcenter
3Ancient GreekκέντρονSomething with a sharp point: point, spike, spur;...
4Proto-Hellenic*kéntron
5Proto-Indo-European*ḱéntrompointed tool
Every word from Proto-Indo-European h₃reǵ-Every word from Proto-Indo-European h₃rḗǵsEvery word from Proto-Celtic rīxs