왔었나

had come, had been there

→ 오다
왔 Past tense + 었 Past tense + 나 Interrogative
verb · informal, pluperfect tense Rare #22,847
had come, had been there The plain, informal question ending 나 is often used with people you know well or when thinking aloud.
KO: 너도 어제 모임에 왔었나?
EN: Did you come to the gathering yesterday too?
Conjugation of 오다

여자 친구는 안 데리고 왔었나 보네?

Looks like you didn’t bring your girlfriend, huh?

— Tune in for Love (2019)

그가 왔었나?

Did he come?

— 요짐보 (1961)

"우리 동네 길목까지 왔었나 보네"

Looks like they made it as far as the entrance to our neighborhood.

— 로렌스 애니웨이 (2012)

그때 결혼식에 자네도 왔었나?

Did you come to the wedding that time too?

— 마농의 샘 1부 (1986)