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.
What does Atharv mean?
From Sanskrit atharvan (अथर्वन्), the name of the Atharvaveda and of the ancient sage traditionally said to be the first priest of fire. Commonly taken to mean 'knowledge' or evokes the Vedic fire-priest.