Sibling points - Discrepancy in Parent's Names

Hello all,
My wife’s brother is a Canadian citizen and I am claiming points under ‘Sibling’ category. In order to prove the sibling relationship, I’ve their birth certificates and passport copies with parent’s details. However, the problem is

  1. On my wife’s documents, father’s name is mentioned as ‘xxx’
  2. On my brother-in-law’s documents, father’s name is mentioned as ‘xxxKumar’ (addition of the word ‘Kumar’ after the name)

Would this be in an issue? Can I go ahead and submit the documents?

Unfortunately, my father-in-law is no more.

Have anyone faced similar issue? Appreciate the input. thanks!

Are the names different on both, the birth certificates and the passports?