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 Riddhi mean?
From the Sanskrit ऋद्धि (ṛddhi), 'prosperity, success, abundance, good fortune'. In one Puranic tradition Riddhi is a consort of Ganesha (paired with Siddhi), though Ganesha's marital status varies across texts.