hi,

no it might not be a big issue, however it is better to use the name spelling as on 10th  board exam  mark sheets, my point is you need to use the spelling which is available for most of the documents. now when you will join a office there will be many formality, form filling where you need to write your fathers name, now once it get entered in certain documents it will be difficulty to change all.

so better do any kind of correction before verification process.