SB 10.1.57
kirtimantam prathamajam
kamsayanakadundubhih
arpayam asa krcchrena
so ’nrtad ativihvalah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Vasudeva was very much disturbed by fear of becoming a liar by breaking his promise. Thus with great pain he delivered his first-born son, named Kirtiman, into the hands of Kamsa.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In the Vedic system, as soon as a child is born, especially a male child, the father calls for learned brahmanas, and according to the description of the child’s horoscope the child is immediately given a name. This ceremony is called nama-karana. There are ten different samskaras, or reformatory methods, adopted in the system of varnasrama-dharma, and the name-giving ceremony is one of them. Although Vasudeva’s first son was to be delivered into the hands of Kamsa, the nama-karana ceremony was performed, and thus the child was named Kirtiman. Such names are given immediately after birth.