という人が

there is someone who says that

→ と
phrase Uncommon #14,027
there is someone who says that Used to introduce someone who says or believes something. It is often followed by います, meaning “there is someone who...”
JA: 日本に行きたいという人がいます。
EN: There is someone who says they want to go to Japan.

こちらに夏子という人がいません

Is there someone named Natsuko here?

— 君たちはどう生きるか (2023)

パーシーという人が君のいますか

Is there someone named Percy in your group?

あなたに是非お会いしたいという人が玄関に来ています

Someone who very much wants to meet you is at the door.

あなたに会いたいという人がいます

Someone wants to meet you.

あなたにお話ししたいという人が下に来ています

There's someone downstairs who wants to talk to you.

毎年何百万という人が飢え死んでいる

Millions of people die of hunger every year.

何とかさんという人が今日来ました

Someone named Nantoka-san came today.

チャウという人が電話をくれ会社帰り

Someone named Chau asked me to call him—on my way home from work?

— 花様年華 (2000)