Where does “iðʀ” come from?

iðʀ (Old East Norse) comes from Proto-Germanic izwiz, from Proto-Germanic *jūz, from Proto-Indo-European túh₂ — you, thou.

Ancestry of “iðʀ”, step by step

StepLanguageWordMeaning
1Proto-Germanicizwizaccusative/dative/instrumental of *jūz
2Proto-Germanic*jūz—
3Proto-Indo-Europeantúh₂you, thou

Words derived from “iðʀ”

Every word from Proto-Indo-European túh₂ →Every word from Proto-Germanic *jūz →Every word from Proto-Germanic izwiz →