Herr
German, from Old High German hērro, comparative of hēr ‘exalted’.
wiktionary
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etymonline
Herr
German equivalent of Mister (but also used without a name), 1650s, originally "nobler, superior," from Middle High German herre, from Old High German herro, comparative of hēr "noble, worthy, important, exalted," from PIE *kei- (2), a color adjective (see hue (n.1)), in suffixed form *koi-ro- here meaning "gray, hoary," hence "gray-haired, venerable." Cognate with Old Frisian hera, Dutch heer; perhaps in this usage a loan-translation of Latin senior in the High German area that spread into other Germanic languages. Hence also Herrenvolk "master race," the concept of the German people in Nazi ideology.
