Where does “バイエルン” come from?

バイエルン (Japanese) comes from German Bayern, from Middle High German Baiern, from Old High German Beiara.

Ancestry of “バイエルン”, step by step

StepLanguageWordMeaning
1GermanBayerninflection of Bayer: ##...
2Middle High GermanBaiern—
3Old High GermanBeiara—
Every word from Old High German Beiara →Every word from Middle High German Baiern →Every word from German Bayern →