Hi Karthik Turaga,
Thanks for sharing your concern on Microsoft Q&A.
Regarding your name change request for your certification purpose. In this situation, here is the contact support of home user that you can reaching out:
- Click on this page Contact - Microsoft Support, type "Change subscription name" to search and click "Sign in to contact support" at the bottom of the page.
- Sign in to another available Microsoft account. Make sure you log in with your personal account.
- Under Products and Services, select "Other Products".
- Under Categories, select "Account Question" and click Confirm.
- Click on "Chat with a support agent in your web browser".
Please contact chat during local working hours. I hope you can solve the problem smoothly.
Best regard,