Lord Varuna was one of the twelve sons of Aditi. The Devas appointed him the Lord of all waters.
Lord Varuna is the sustainer of universe and guardian of the moral order right.
Lord Varuna is constantly called ‘Dhritavrata’ or one whose laws are established. The gods themselves are said to follow his ordinances. No creature can even wink without his knowledge.
Lord Mitra was Varuna’s companion and represented daylight and sun.