What does Pranav mean?
From Sanskrit pranava (प्रणव), the term for the sacred syllable 'Om', regarded as the primordial sound. A spiritually weighted name meaning the mystic syllable itself.
What does Dhruv mean?
From the Sanskrit ध्रुव (dhruva), 'fixed, firm, immovable, constant'; also the name of the Pole Star and of the boy-devotee Dhruva in the Puranas, who became the unwavering North Star.