Where does “아기씨” come from?

아기씨 (Korean) comes from Korean -씨, from Korean —이, from Middle Korean 이 — person.

Ancestry of “아기씨”, step by step

StepLanguageWordMeaning
1Korean-씨Indicating a surname itself or the lineage or member of the surname
2Korean—이For non-honorific nouns ending in consonants, the nominative case particle marking it as the subject of a verb or adjective; see also Usage Notes
3Middle Koreanperson
Every word from Middle Korean Every word from Korean —이Every word from Korean -씨
아기씨 — Etymology, Origin & Word History | Etymology Explorer