What does Rani mean?
From Sanskrit 'rajni' (rani), the feminine of 'raja', meaning 'queen'. Used for both a queen regnant and a raja's wife across the Indian subcontinent and Southeast Asia.
What does Vaishnavi mean?
From the Sanskrit वैष्णवी (vaiṣṇavī), feminine of Vaishnava, 'relating to Vishnu'. It denotes a female devotee of Vishnu and is also the name of the Shakti (divine energy) of Vishnu, one of the Sapta Matrikas.