Etymology tree Proto-Indo-European *tewtéh₂ Proto-Germanic *þeudō Proto-Indo-European *h₃reǵ- Proto-Indo-European *-s Proto-Indo-European *h₃rḗǵs Proto-Celtic *rīxsbor. Proto-Germanic *rīks Proto-Germanic *Þeudōrīks Proto-West Germanic *Þeudurīk Old High German Diotrīh Middle High German Dietrich German Dietrichbor. Polish wytrych Borrowed from German Dietrich. Doublet of Dietrich. Compare…