Changing President Name

My country's president name was pulled from the unique username left of the @ character of my email address. I regard this information as to personal to be in my country profile. I have failed to find where to change this, and searching online has not yielded relevant results.

So, how do I change the president's name of my country?

Edit: The president's name just updated from my public profile, which I modified approximately fifteen minutes ago. Yet, I see that I have the same problem on this forum. What the hades.