何名

how many people

何 what; which + 名 name
noun Rare #44,598
how many people 何名 is a polite, somewhat formal way to ask about the number of people.
JA: 今日は何名来ますか?
EN: How many people are coming today?

車の中に女性は何名いらっしゃいますか?

How many women are in the car?

グリムボルド何名だ?

How many people, Grimbold?

— ロード・オブ・ザ・リング/王の帰還 (2003)

けが人は何名だったの?

How many people were injured?

会議に出席したのは何名ですか?

How many people attended the meeting?