Article 1 127 of the Civil Code stipulates that in legal succession, the inheritance is in the following order: (1) the first order: spouse, children and parents; (2) The second order: brothers and sisters, grandparents and grandparents.
So after your father died, your grandparents, your mother, your brothers and sisters were all heirs in the same order. After your father's death, half of the house that your father shared with your mother will be your mother's property, and the other half will be inherited by your mother, your grandparents (if they are still alive) and your brothers and sisters according to law.
In this case, if you want to transfer the property to the child's name, you need to get the consent of your mother, your grandparents and your brothers and sisters.
If your mother, your grandparents, your brothers and sisters are unwilling to give up inheritance, then according to the law, they cannot be transferred to the name of one of their children.