誰だろう

I wonder who it is; who could it be?

→ 誰

phrase Rare #29,031

I wonder who it is; who could it be? Used to wonder aloud about someone’s identity, or to ask oneself who someone is. Casual; だろう gives the question a wondering tone.

JA: あの女の子は誰だろう。

EN: I wonder who that girl is.

誰だろう

I wonder who it is.

— どん底作家の人生に幸あれ! (2019)

「誰だろう？」「トムかな」

“Who could it be?” “Maybe it’s Tom.”

あれっ誰だろう？

Huh, I wonder who that is?

— ハウルの動く城 (2004)

誰だろう？

I wonder who it is?

— パラサイト半地下の家族 (2019)

彼女と一緒にいた人たちは誰だろう？

I wonder who the people with her were.

あの女の子は誰だろう。

I wonder who that girl is.

あの人たちは誰だろう。

I wonder who those people are.