Someone elses' contacts from my iCloud family showed up on my Mac

I tried syncing my contacts from my iphone to my mac. I turned on conatacts in settings under icloud. Once I did this someone elses conatacts from my icloud family showed up on my mac. How do I get them off?

I am on a MacBook Air M1 and am on macOS Sononma 14.4.1.

[Edited by Moderator]