As Daisy correctly answered, to change the Publisher name from Unknown to your Firm name,
you need a Certificate to sign the Executable file and DLLs you produce.
The certificate can be bought by the same organizations selling SSL certificates, but is a different kind of certificate.
Where a third party certificates that you are you ;) after the signing the Setup program shows your name instead of the Unknown.
The signing can be done using signtool.exe that is available in the windows 10 sdk.
HTH