Using New Outlook on Windows for professional communication and productivity
Dear Dear Fahmi ArifMuhamad
Welcome to Microsoft Community.
We understand that when you send emails to yourself in Outlook, you will find that your name does not match with your actual name.
This list belongs to Suggested Contacts as well as History, and you will see that the name is different from your current name, this is because this could be the name of the email that you have set up before, if you don't want to see this name then you just need to remove it from the Suggested Contacts. If you don't want to see this name then all you need to do is remove it from the suggested contacts. To do this you click on the X on the right.
I hope the above information is helpful to you.
Best Regards,
Peter.Y-MSFT | Microsoft Community Support Specialist