Great! We call it Mundan. It's the eighth out if total 16 hindu Samskaras (rituals). The cremation is the last of them. You would be surprised to know that the first ritual is already done while the baby is not even in the womb of mother.

You can read all about 16 Samskaras here https://www.prathaculturalschool.com/post/16-sanskaras-in-hinduism