Proof of relationship

[Kcharles20]

How do i prove that i am related to my uncle since we both carry different last names?

 

[kat3onah]

How do i prove that i am related to my uncle since we both carry different last names?

Birth certificate of your parent (who is related to your Uncle) , your Uncle and yours.
It can be established that your parent and Uncle have the same parents and you are the offspring of your parent.