Inderbir is a Sikh given name meaning “Brave like Indra.”
“Brave like Indra”
English gloss from the Gurdwaras.com Sikh names reference. Spellings vary; confirm the Gurmukhi with your family or granthi if you are choosing a name for a hukamnama or a legal document.
Listed here as boy. In Sikh practice the given name is usually followed by Singh (for a boy) or Kaur (for a girl). Those are religious names, not family surnames.
Noted origin in this reference: Punjabi.