1. She is the daughter of her father also for which as per the custom she should carry her father's surname,
2. Only your desire to change her surname to your maiden surname will not be accepted by the Court. Her father's desire also will be sought in this regard,
3. If both of you file petition for declaration that she should have your maiden surname as her surname, the Court will pass the said declaratory order,
4. This Court order i required for changing her surname since when she grows up she will face problems from passport and/or other departments for not having surname of her father what have been mentioned in her birth certificate.