In Islam, the prerogative of naming the child lies with the parents. If a
father and mother disagree on a name, then the father has the right to name
the child. (Bringing up Children in Islam by Ml. Habibullah Mukhtaar pg.30)
In your particular instance, you have waived your right, hence, your wife
(i.e. mother of the child) is more rightful in naming the child.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai
FATWA DEPT.