Changing Name after Marriage

Hi All,

I am ready to apply for Canada Immigration from India, but I got confused at the last stage.

My Husband's name is : Tariq Ali Khan

My Name is : Meena Umar

Add my Son's name is: Mohd. Aaban Khan

I dont changed my last name after my marriage. So accordingly all names are in different patterns.

But in my son's Birth Certificate they have mentioned his Mother's name as " Meena Khan", and accordingly his Passport got into Objection.

So I am standing no where now.

Please guide anyone what should I do. Should I get my last name change to Meena Khan and in case I have to do that what other formalities would I be following as I dont want to kill my time.
I am already very late.

I would be needing my last name chnage on my Passport and my Husbands passport. Is there anything else I would be doing as everywhere I am Meena Umar.

Also will it affect if my sons name spells as Mohd. inplace of Mohammad and he dont have Ali in his name similiar to his father's name.

Please guide.