What does Ishani mean?
From Sanskrit ishani (ईशानी), 'mistress, ruler', a name of the goddess Parvati, consort of Ishana (Shiva). Well established as a goddess name.
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.