This is the 9904th most frequent Japanese word.
誰々
"誰々" means "so-and-so" or "someone" (unspecified person).
The word '誰々' acts as a placeholder for an unspecified person or group.
誰々がその会議に参加しましたか？
Who attended the meeting?
Here, '誰々' refers to unnamed individuals to convey generality.
彼は誰々に連絡を取らなければならないと言いました。
He said that he needs to contact someone.
In this instance, '誰々' is used to reference specific individuals without naming them for discretion.