Is it permissible to withdraw from naming the awaited newborn "Muhammad" – a name vowed for him if he is born healthy – knowing that the vow was made without consulting the husband, and that the name "Muhammad" is common in the family?

If the father of the fetus grants you the right to name the child, and you vow to name him Muhammad if he is born a healthy male, then the vow is binding. However, if the father of the fetus does not grant you this right, then your vow is not binding on you, and there is no expiation for it; because the Prophet, peace and blessings be upon him, said: "There is no vow in disobedience to Allah, nor in what a person does not possess." The meaning is: there is no fulfillment for a vow concerning what a person does not possess, whether legally or practically.