Why username of Annotate(blame) is not same to author of commit in IntelliJ IDEA?

Question

when I use git annotate in IntelliJ IDEA, the username of author of some lines is not same to author name of this commit, like this pic:

As you can see, fan.qp and Qp is not same, why so?

When I use bash or SourceTree to run git blame, the two names are the same.
Is this a error of IDEA?

Answer 1

You can change how it's displayed just like @Ruslan Kuleshov said –

Right-click on gutter > View > Names