Where does “Arrigorriaga” come from?

Arrigorriaga (Basque) comes from Basque gorri, from Basque aitz, from Basque eta, from Latin et, from Proto-Indo-European éti, from Proto-Indo-European h₁é, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

Ancestry of “Arrigorriaga”, step by step

Arrigorriaga traces back through two separate lines of ancestry.

via Basque gorri

StepLanguageWordMeaning
1Basquegorrired; bare, naked
2Basqueaitz
3Basqueetaand; plus, and; upon, after
4Latinetand; plus; though, even if
5Proto-Indo-Europeanétibeyond; over
6Proto-Indo-Europeanh₁éand, then
7Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact

via Basque harri

StepLanguageWordMeaning
1Basqueharriglass; rock, stone
2Proto-Basque*(h)aRistone
Every word from Proto-Indo-European ǵʰeEvery word from Proto-Indo-European h₁éEvery word from Proto-Indo-European éti