Where does “aftero” come from?

aftero (Old High German) comes from Proto-Germanic after, from Proto-Indo-European h₂epoteros — further behind, further away.

Ancestry of “aftero”, step by step

StepLanguageWordMeaning
1Proto-Germanicafterafter, behind
2Proto-Indo-Europeanh₂epoterosfurther behind, further away
Every word from Proto-Indo-European h₂epoteros →Every word from Proto-Germanic after →
aftero — Etymology, Origin & Word History | Etymology Explorer