Issue with Mother's name in passport

[jshreya42]

Hi folks,
I needed some help with my passport and documents. My mother's name in all my documents including my passport is her nickname XYZ, whereas in all her/ my father's official documents it is ABC ie her official name.

While applying for VISA to US/Canada do I need provide her name same as the one mentioned in my passport ie XYZ or do I need to mention her official name ABC?
I'm trying to get it corrected in my passport currently.
I only have one affidavit which proves that ABC & XYZ are the names of the same person. Don't have any other document for it.
Also if I don't change her name in my passport ie keep it XYZ only then will I ever be able to call her to foreign country as a dependent?
Any ideas if affidavit/gazette for name change is considered valid outside India?

Are highschool marksheet really needed anywhere ie 10th/12th marksheets?

Please let me know your thoughts.

[Liberty48]

Use her official name from now on all official documents, including in your new passport application. I think it is required. Include the affidavit the first time you switch from nickname to official name.

p.s. I did have different names in my passport and changed it long ago without any problem. I did not have the same issue.