Bruh there is literally a popular media character called Captain America.
If you were trying to satirically come up with the main character of a state propaganda show, a name like that would probably come to mind. For satire.
Imagine how US Libs would react if a superhero called Captain China started getting really popular.
If you changed up the colors on his shield just a little, he could easily be Captain DPRK.
This is my headcanon now.