My Contacts has someone else as me
im my contacts it has someone else as me. Whenever auto fill happens it puts their info in. There is a little me on the right side of their name in contacts
iPhone 13 Pro
When you look deeply you will find that Contacts are neither stored on an iPhone nor on SIM. They are synced to an email account that you may have added and enabled Contacts. It could be Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other email client server.
When you enable Contacts in any of the email accounts they are displayed to you through the Contacts App. When you edit these contacts on an iPhone they are ultimately edited on the client-server.
Please see the pic below for a better understanding...