Vaibhavgupta @Jatin , I already add the procedure above. The website link and step to step process. Please check the 8th July post.
Procedure of making correction in ICSE/ISC certificates
PoojaSingh I am asking for parent’s name correction not for recheck of copy
PoojaSingh madam if you can please elaborate the process of correction in parents name and total fees charged by cisce for passed students.
Vaibhavgupta Give me some time I have to check the process first and then I will elaborate the process.
PoojaSingh yes please do that 
4 days later
GeetYaduvanshi
Is the process same to modify fathers name to include his initials.
Original Sridharan to
Sridharan t r
is there any update i need to change father name too
5 days later
Vaibhavgupta I am not able to find anything online, someone has to go to school and ask the proper process and help others here.
a month later
GeetYaduvanshi Does ICSE takes original certificate to rectify it?
GeetYaduvanshi Can I change my surname after 10 years if I have the 1st class magistrate papers to do so?
Vaibhavgupta I have same problem too and my school is asking for the original documents and said they will send it to council. Should I give my original mark sheet ?
13 days later
@“Bhumii2327” Yes give it to them you will get corrected one within one month
I have given marksheet to school
Apart from that I also gave
An affidavit
Birth certificate
Newspaper cutting regarding change
And paid the required amount in school.
I got it within 30 days my corrected marksheet
@Bhumii2327 yes give it to them. I too submitted my original in school and got new one within 30 days.
11 days later
Vaibhavgupta Brother, my actual name is Raj Krishna Vats in my adhaar card and class 12 marksheet but my name in my class 10 marksheet is ‘Rajkrishna Vats ’ . There is no gap between Raj and Krishna in my class 10 icse marksheet. I have not rectified it yet and I am going to appear for jee mains 2024 in January for the last time because I am a dropper. And the registration process for jee mains will start from next week probably and name on the jee mains form is filled according to 10 marksheet. Will I be allowed to register myself for jee or will I be disqualified because there is no time left for me to correct. Should I go to school for correction or directly icse council kolkata office. I am from Deoghar Jharkhand. Please reply bhaiya
Rajvats Change your name in Aadhar card online, It will take significantly less time. The supporting document for updating of name will be your 10th, 12th marksheet. 
Visit the official link if you want to know more about the updation of the aadhar card - https://uidai.gov.in/en/my-aadhaar/about-your-aadhaar/updating-data-on-aadhaar.html
a month later
Rajvats if possible you can submit .They do not take more than 1 months for correction.
Rajvats I don’t know much about the exams eligibility conditions and disqualification if name correction problem is there.It would be better you should take expert advice .
Rajvats you have to visit your school.
My mothers name is wrong in 10th and 12th marksheet can it be corrected through online apllication