Endorsement of child's name is not allowed any more on the parent's passport. A separate passport is required to be obtained in the name of the infant. An online application can be submitted as in the case of an adult's passport and the infant has to be physically present at the Passport Seva Kendra for giving biometrics and photographs.
The given procedure has to be followed in any case. The issue of passport is a legal procedure and it cannot be changed as per individual applicant's requirement.
In case the parent(s) of the minor hold a valid passport, then a photocopy of the same has to be submitted along with the infant's application. The spouse name has to be endorsed on the parent's passport. In case it is not yet endorsed and the parents can get it endorsed by submitting an application for re-issue of their own passport for endorsement of the spouse name.
Both the parents need not have valid passports. The advantage of one of the parents having a valid passport with spouse name endorsed is that the infant gets the passport without undergoing the police verification process.