بسم الله الرحمن الرحيم
Q: Who has more right with regards to naming the child, the father or mother?
A: There is no differing between the people that the naming of the child is the father’s right and not the mother’s. This is because the child is attributed to him (through lineage), thus he has more right to name him. Likewise, just as it is binding upon him to spend, educate, perform the aqiqah, etc the naming also is for him. As a result the creation, on the day of resurrection, will be summoned by their fathers’ names and not their mothers. One will only be affixed to his mother in terms of when a husband accuses his wife of having a child through adultery (And they both bear witness that the other is lying), fornication, and other situations from the known affairs in Islamic jurisprudence.
Translated by Abu Abdil Waahid Najeeb ibn Yusuf Al Anjelesi
Source: أربعون سؤالاً في أحكام المولود