What is the ruling if the mother and father disagree on naming the newborn, and the mother registers a name that the father does not desire and is not of good meaning, so by what name should the child be called?

Naming the newborn is the father's right, and it is sunnah to consult the mother. If they disagree, the decision rests with the father.

The child is to be called by the name the father chose. The mother's act of registering a different name is incorrect unless the father approves; if he approves, then there is no harm.

The interpretation of the name "Lu'ayy" as "slowness" is not agreed upon, and it might be commendable in the sense of deliberation.

The wife should repent if she has disobeyed her husband's command. Both spouses should reach an understanding and choose a good name for the newborn.