legal name

noun2

1. •
   The name of a natural person recognized on official records, especially as recorded on a birth certificate or as changed by a legal process.

   • He signs his name "Johnny Reb Smith", but his legal name is "Jean-Marie Smith".
2. •
   The name of an organization as indicated in its founding documents, or as subsequently changed by a legal process.

   • The legal name of "Jack's Mattresses" is "JM Enterprises {2006} (Illinois) Inc.".