Rta

In the Vedic religion, Ṛta (/ˈrɪtə/; Sanskrit ऋत "ṛta" "order, rule; truth") is the principle of natural order which regulates and coordinates the operation of the universe and everything within it. In the hymns of the Vedas, "Ṛta" is described as that, which is ultimately responsible for the proper functioning of the natural, moral and sacrificial orders. Conceptually, it is closely allied to the injunctions and ordinances thought to uphold it, collectively referred to as "Dharma", and the action of the individual in relation to those ordinances, referred to as "Karma" – two terms which eventually eclipsed "Ṛta" in importance as signifying natural, religious and moral order in later Hinduism. Sanskrit scholar Maurice Bloomfield referred to "Ṛta" as "one of the most important religious conceptions of the "Rigveda", going on to note that, "from the point of view of the history of religious ideas we may, in fact we must, begin the history of Hindu religion at least with the history of this conception".
Etymology.
its Avestan equivalent "" (Asha "Truth") properly joined, right, true", from a presumed root "*".
The derivative noun "ṛta" is defined as "fixed or settled order, rule, divine law or truth". 
In proper names.
"Ṛta-" or "arta-" sometimes appears as an element in Vedic and Indic personal names, as with Iranian.
In India the vocalic 'ṛ' of Sanskrit is transformed into the modern 'ri', or in South India, 'ru'. Indian names include: