Name Change Affidavit Affidavit For Name Change In Mumbai?

Affidavit for name change in Mumbai? - name change affidavit

Although born in India, grew up in Canada .. I have some documents in my name as a minor. But my passport has a different name. How do I change my name in old documents. Who knows what kind of affidavits from people close to Matunga / king circle / Andheri area?