You must apply for a new passport (Adult General Passport Application). You would not qualify for the ‘simplified Renewal Application Process? due to your name change request. On your application you must provide at least one valid government-issued ID with your new name request and signature, for example a Provincial/territorial/state driver’s licence
If your son is under 16 years of age, you must use the “Child General Passport Application” form PPTC 155 and, if applicable, ensure that all documents regarding custody or mobility of, or access to the child are submitted.
Please visit Passport Canada for more information or call direct: Toll free: 1-800-567-6868