Makara (Hindu mythology) in the context of "Vahana"

Varuna (/ˈvɜːrʊnə, ˈvɑːrə-/; Sanskrit: वरुण, IAST: Váruṇa) is a Hindu god. He is one of the earliest deities in the pantheon, whose role underwent a significant transformation from the Vedic to the Puranic periods. In the early Vedic era, Varuna is seen as the god-sovereign, ruling the sky and embodying divine authority. He is also mentioned as the king of asuras, who gained the status of a deva, serving as the chief of the Adityas, a group of celestial deities. He maintains truth and ṛta, the cosmic and moral order, and was invoked as an omniscient ethical judge, with the stars symbolizing his watchful eyes or spies. Frequently paired with Mitra, Varuna represents the magical and speculative aspects of sovereignty, overseeing the relationship between gods and humans.

The transition from the Vedic to later periods saw Varuna's domain begin to shift from the firmament to waters. He became associated with celestial waters, marking the initial phase of his transformation. By the time of the Itihasa-Purana, Varuna had transformed into the lord of all waters, ruling over oceans, rivers, streams, and lakes. Depicted as residing in a magnificent underwater palace, akin to Poseidon in Greek mythology, he is attended by river goddesses like Ganga and Yamuna. Varuna’s earlier supremacy diminished, and he was relegated to a lesser role as a dikpala, or guardian of the western direction. He is depicted as a youthful man, mounted on Makara (crocodile-like creature) and holding a Pasha (noose, rope loop) and a pitcher in his hands. He is depicted as having multiple wives and children, the most notable of the latter being the sages Vasishtha and Agastya.

Shravana (Devanagari: श्रवण), also known as Thiruvonam in Tamil and Malayalam (Tamil: திருவோணம், Malayalam: തിരുവോണം), is the 22nd nakshatra or lunar mansion as used in Hindu astronomy, Hindu calendar and Hindu astrology. It belongs to the constellation Makara (Devanagari: मकर), a legendary sea creature resembling a crocodile] or Capricorn. The name alludes to Shravan, a mythological character who attained repute due to his utmost devotion to his aged and blind parents.

Lord Venkateswara of Tirupati and Lord Oppiliappan near Kumbakonam, who married Markandeya Rishi's daughter Bhuvalli, are believed to be born in this Nakshatra in the Bhadrapada maasa. Onam, the biggest festival of Kerala, is celebrated on this Nakshathra in the Malayalam month of Chingam.