Aryan Raj 24 December 2021
In response to your query,
Yes it is important for you to have your 10th marksheet to satisfy the criteria for proof of D.O.B., but instead you can also use a college/university transfer certificate, a school leaving certificate, or a matriculation certificate, as long as the certificate contains the applicant's D.O.B.
And as you mentioned you have already gotten your name changed in other documents I don't think it will be that big a problem. But to be more sure you can also get an affidavit and attest it to your marksheet stating that you are the same person as the person in the marksheet and in other documents of yours who has just changed his name.
Regards,
Aryan Raj