кем ты был

who you were

→ кто
phrase Rare #30,771
who you were In a question, кем ты был? can mean “who were you?” or “what were you?” depending on context. Был is masculine; with с before the phrase, с кем ты был means “who you were with.”
RU: Кем ты был до того, как стал врачом?
EN: What were you before you became a doctor?

И кем ты был?

And who were you?

— Рома (2018)

След того, кем ты был?

A trace of who you were?

— 28 лет спустя: Храм костей (2026)