Well, I have yet to meet anyone who became a Christian before they had ever heard of Jesus.
Well, most of us Anglicans and most Catholics would probably fit that description.
We get Baptized at birth. Parents and God-Parents stand in for the child during the ceremony and the infant is accepted into the communion.
The child is accepted as a Christian from that moment on, but it is also recognized that the child is yet too young to make an informed decision. That takes place later when the child goes through Confirmation. At that time the child goes through a study period and then makes what is hoped to be an informed decision as an adult.
Before confirmation, all responsibility lies with the parents, God-parents and community. The Confirmation service is when the child takes full responsibility for his or her own behavior.
It is very much related to determining how a person should behave, how they should try to live their lives.
Aslan is not a Tame Lion