Changing First Name

[Sachin Kumar]

So after Selection I saw that there is an acceptance Letter that I got in my profile , and I think it used my Full Name that I provided in GSOC , but I used my nickname as my First Name and I want to use another First Name (which will help me more professionally) , can I do that ?

I can still change it in GSOC Profile but how can I get another Acceptance Letter with changed First Name?

Also If I change my First Name in GSOC Profile will It be reflected in the Final Certificate of Completion too?