Where does “Upper Bauko” come from?

Upper Bauko (Ilocano) comes from English Upper Bauko, from English upper, from Middle English upper.

Ancestry of “Upper Bauko”, step by step

StepLanguageWordMeaning
1EnglishUpper Bauko
2EnglishupperAt a higher level, rank or position; Situated on...
3Middle Englishupper
Every word from Middle English upper
Upper Bauko — Etymology, Origin & Word History | Etymology Explorer