There are no definite criteria that can set a parameter in which you can name a child and it is all about the individual's choice that decides that with what name you want to call your small child.
Usually the name people use to call their kid is baby and is considered as a synonymous term for a small child. But even this term is not mandatory and the name differs from region to region, let alone the countries or continents.
Some people even call their small child as kid and a few among them do not like any other name than that of the name that is prevalent in the birth certificate of the person. So you can also choose the name you want to give to name to your kid and don't think about what others are thinking about them.
Usually the name people use to call their kid is baby and is considered as a synonymous term for a small child. But even this term is not mandatory and the name differs from region to region, let alone the countries or continents.
Some people even call their small child as kid and a few among them do not like any other name than that of the name that is prevalent in the birth certificate of the person. So you can also choose the name you want to give to name to your kid and don't think about what others are thinking about them.