Never get confused with all these things, name is meaningful unless for a purpose. In your case you have not mentioned about birth certificate and the name there in. The birth certificate is the important document when entering the name, surname in the x standard/TC. Make your self clear :
1) You want aadhaar card, voter card etc., as in pension documents otherwise..
2) You make one thing clear what is the name you want to actual name or as mentioned in x standard
My suggestion, when pension documents are clear and getting financial benefits better do change every thing in the same way as in pension. Get Aadhaar edited in the e-governance, licence can be edited by getting new one, apply for new voter id ( as elections are 5 years once you can get it done).
As a children you make yourself clear in all documents with your surname and father name never muddle with names.
best of luck ....
6th October 2017 From India, Arcot