Change of last name is with prospective effect 

your last name cannot be changed in birth certificate  now 

Make an application to the Registrar of Births and Deaths under your Municipal corporation

The letter should contain your old name’s details, your new name’s details, and a brief statement of the reasons for seeking a name change.

3)enclose affidavit of name change 

4)you should issue a small advertisement in the local newspaper, as a public declaration of nabe change 

1. Make an affidavit for change of name, including your full name, reason for change, father's name, and residential address. Sign and notarize the affidavit.

2. Place an ad in a leading local daily newspaper with details of your old name, new name, address, name of witnessing/attesting authority, and date of the affidavit.

3. Submit the affidavit, original newspaper ad, proforma with your details and two competent witnesses' signatures, CD with scanned copy of application, two passport size photos, photocopy of valid ID proof, and a request letter with fee to the official gazette.

It will take 45 to 60 days for the gazette to publish the change of name.

- You can submit an application before the Tehsildar in Rajasthan from where this certificate was issued for changing /adding the surname , after submitting the passport copy. 

- You have to submit the other proof of name including an affidavit to confirm that you have change your name and further you will know with the new name. 

You cannot change the name in your birth certificate as per your own desire, however this will not prevent you from changing your name, you can follow the name change procedure as per law, i.e., by preparing an affidavit, getting it publicized in newspaper and also in a government gazette publication etc. 

The copy of the gazette publication should be the proper document to change  the name in the passport .

Yes, it is possible. The copy of the gazette publication should be the proper document to change  the name in the passport.

You can't change you nane on birth m certificate. The copy of gazette notification will be enough for passport purpose 

The process of changing the last name in a birth certificate can vary depending on the country and jurisdiction. In India, the procedure to change the name in a birth certificate is governed by the Births and Deaths Registration Act, 1969, and the rules framed under it by the respective State Governments.

In your case, since your birth certificate has been issued by the Rajasthan government, you will need to follow the procedures prescribed by the Rajasthan government to change your name in the birth certificate. The process may involve submitting an application along with supporting documents to the Registrar of Births and Deaths in Rajasthan. The supporting documents may include your passport, identity proofs, affidavits, and newspaper publication of name change notification, among others.

If you find the process too long and difficult, you may consider hiring a lawyer or a legal service provider who can assist you in the name change process. They can help you with the documentation and filing of the application to the concerned authorities.

It's important to note that changing your last name in your birth certificate will require legal documentation and time. Therefore, it's recommended that you consult with legal experts or officials from the relevant department for the correct procedure and guidance.