Q5 :, We need to know all of the names you have ever used in order to verify your identity. If you used any other names other than the one being requested in your grant of citizenship application, print them in the chart. Examples: Name at time of birth, name before marriage, previous married names, married name, nick names or any other names you have used. If you have legally changed your name, see Appendix A – Changing the name on your document.
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-0002-application-canadian-citizenship-under-subsection-5-1-adults-18-years-older.html
N/A or your full name in this section would work
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-0002-application-canadian-citizenship-under-subsection-5-1-adults-18-years-older.html
N/A or your full name in this section would work