That is described in Vedic literature. People say God has no name. That is right. He has no particular fixed name. But His names are there according to His different activities. Just like His name is Devakī-nandana. Because He accepted Devakī as His mother, therefore He is called Devakī-nandana. Similarly, He is called Nanda-nandana, Yaśodā-nandana, Vrajendra-nandana—in relationship with Nanda Mahārāja, Yaśodā, His foster father and mother. Similarly, He is sometimes named Pārtha-sārathi because He acted as the chariot driver of Arjuna. Arjuna's name is Pārtha. His mother's name is Pṛthā, Kuntī's. From Pṛthā, his name is Pārtha. From his father's name, Pāṇḍu, his name is Pāṇḍava. So in this way big personalities or anyone, they should tally, the name should tally with the activities. This is nomenclature.
In the... According to Vedic civilization, after the birth of the child, there was name-giving ceremony, what kind of name.