Birthright

noun

1. A right, possession, or privilege that is one's due by birth.
2. A special privilege accorded a firstborn.
3. Any right or privilege to which a person is entitled by birth, such as an estate descendible by law to an heir, or civil liberty under a free constitution; specifically, the right of primogeniture.
4. Any right, privilege, or possession to which a person is entitled by birth, such as an estate descendible by law to an heir, or civil liberty under a free constitution; esp. the rights or inheritance of the first born.
5. something owed since birth, due to inheritance.