Transfer Minecraft to a Childs account

Nothing can be transferred between accounts.

you can indeed transfer money from a parental account to a child account, can be done accidentally too, not sure if there is a way to transfer back as child account cannot transfer money.

In the case of Minecraft Java, you will need to purchase Minecraft on your son's account, unfortunately.

"If you are purchasing Minecraft: Java Edition for a child, the child must have their own Minecraft account. And to make the purchase, you must sign in to their account to do so; games cannot be transferred between accounts."

For more information, please refer to:

https://help.minecraft.net/hc/en-us/articles/36...

Now, since you purchased it on a Mojang account, maybe they can open an exception for you or give you a discount on the second purchase for your son. You can try to contact their official support:

https://help.minecraft.net/hc/en-us/requests/new

I take it I can not transfer the Xbox profile to another Microsoft account? As a parent that set up the game when my kids were young, it should be transferable once the child comes of age.

So is it possible then to delete gamer tags /Minecraft profiles and restart completely so that they can use their current emails? Or will that screw up my Xbox account?

You can't transfer licenses or content from one account to another.

The accounts Parent / Child are separate accounts. The parent account just manages the child account.

The child account will remain a child account until the birth date that was used for that account reaches the age of 18.